Related
Our company ships an MVC based product (targeting v4.5) which has stopped working on a customer site for what appear to be environmental issues - a build which worked with no problems once upon a time now gives a 403.14 - The Web server is configured to not list the contents of this directory.
.
What I think is happening...
The user accesses http://server/AppName
Because it's an MVC app, the default route (Reports/Index) should be used.
Instead IIS is looking for a default document...
... and, not finding one, it assumes the user wants to list the contents of the directory...
...which is not enabled so it throws a 403.14.
.
What I've tried so far...
Accessing the route directly.. results in 404 error. So I'm pretty
sure IIS doesn't realise it should use routing.
Use aspnet_regiis to register ASP.Net with IIS. This was done from the Framework64 folder since...
OS is 64 bit - Windows Server 2008 (Standard without Hyper-V)
IIS is 64 bit - though Enable 32-Bit Applications is true
Checked AppPool is targeting v4 of the framework - it is.
Changed AppPool mode to Classic - was pretty sure it should be integrated but was worth ruling it out. It is now back to Integrated
Confirmed RunAllManagedModulesForAllRequests is set to true in the web.config.
Checked permission conditions defined in <system.webServer> section of web.config are met - they are.
Created the simplest of MVC applications and deployed it - same problem.
Running the command shell as Administrator unregistered ASP.Net using aspnet_regiis -ua and re-registered using aspnet_regiis -enable -i. We hit a couple of permission problems - and the Temporary ASP.NET Files directory was missing but once they were address we were back to the same error.
Added a simple default.htm - when present, this is served in response to the http://server/AppName request.
I'm clean out of ideas and all google hits suggest some combination of the above - or enabling directory browsing (which I think is just a symptom rather than the root cause).
Also, not sure if it's relevant but the amount of configurable elements available for the application in IIS seems a bit below what I would have expected...
Have you Checked the user the application pool process is running under? I think Your site needs to run with permissions to execute the .net libraries and I've seen this just change for seemingly no reason (probably related to an overzealous update to the system).
You can try with the Enabling directory browsing .
assuming you are under Windows Server 2012 or Windows Server 2012 R2
On the taskbar, click Server Manager.
In Server Manager, click the Manage menu, and then click Add Roles
and Features.
In the Add Roles and Features wizard, click Next. Select the
installation type and click Next. Select the destination server and
click Next.
On the Server Roles page, expand Web Server (IIS), expand Web
Server, expand Common HTTP Features, and then select Directory
Browsing. Click Next.
On the Select features page, click Next. On the Confirm installation
selections page, click Install. On the Results page, click Close.
if you using the Windows PC try this in your command prompt as follows:
go to C:\Program Files\IIS Express
then press Enter:appcmd set config
/section:system.webServer/directoryBrowse /enabled
Maybe this is your case https://forums.iis.net/t/1157304.aspx
SQL Server Reporting Services creates a folder called Reports by
default if you install it on IIS. If you install SQL 2008 then
Reporting Services doesn't need to use IIS and instead will try to
reserve the URL with the HTTP.Sys service.
I believe this is the cause of the conflict you are seeing. What you
could try is changing the URL that Reporting Services uses via the SQL
Server Configuration Wizard.
Also I found that
Report Manager of SQL Server can use reports path http://<server name>/reports
Configure a Native Mode Report Server for Local Administration (SSRS)
I think the problem is IIS features that are not installed yet. I have met this kind of problem frequently in Windows Pro. Make sure to turn on every feature under Internet Information Service -> World Wide Services because by default IIS is configured to use WebForms. So there might be some features that not installed yet to use MVC, especially ISAPI filters. In my case, that was the solution. I hope it helps.
Something similar i encountered using VS 2017 & ASP.NET MVC.
Was working on the project for long with no problems at all but suddenly the routing started misbehaving & stopped working.
So I changed the Port in Project Properties Page & it started working.
I really don't know what is the relation between a port & MVC routing modules. Someone else can enlighten if at all this helps.
I had the same problem and I just created an application pool out of the Default Web Site in IIS and stoped the default web site. With that difference you will not have the application pool's path
I know it's been a long time since this question but i've had the same problema recently. I've tried every single configuration, just like #amcdermott did, but the only action that solve the problem was reinstalling .NET Framework.
My app was built under .NET Framework 4.5.2. The application server had the version 4.6.1 and 4.5.2 installed. So, i uninstalled all framework versions and installed the one that i needed.
Please, make sure that no other applications use superior versions of .NET Framework if you going to try this solution.
Here are some quote I find on Microsoft official site which I think may help:
For site administrators
This problem occurs because the Web site does not have the Directory Browsing feature enabled, and the default document is not configured. To resolve this problem, use one of the following methods:
Method 1: Enable the Directory Browsing feature in IIS (Recommended)
To resolve this problem, follow these steps:
Start IIS Manager. To do this, click Start, click Run, type inetmgr.exe, and then click OK.
In IIS Manager, expand server name, expand Web sites, and then click the website that you want to modify.
In the Features view, double-click Directory Browsing.
In the Actions pane, click Enable.
Method 2: Add a default document
To resolve this problem, follow these steps:
Start IIS Manager. To do this, click Start, click Run, type inetmgr.exe, and then click OK.
In IIS Manager, expand server name, expand Web sites, and then click the website that you want to modify.
In the Features view, double-click Default Document.
In the Actions pane, click Enable.
In the File Name box, type the name of the default document, and then click OK.
Method 3: Enable the Directory Browsing feature in IIS Express
Note This method is for the web developers who experience the issue when they use IIS Express.
To do this, follow these steps:
Open a command prompt, and then go to the IIS Express folder on your computer. For example, go to the following folder in a command prompt:
C:\Program Files\IIS Express
Type the following command, and then press Enter:
appcmd set config /section:directoryBrowse /enabled:true
I'm hosting a web application (.Net 4.5) to a remote server using IIS 8.5. The application runs well locally and on the remote IIS, however there is a single page "/Reports/ReportsMain.aspx" that causes the error "The resource cannot be found." I made sure that the page exists.
I also made sure that the .Net version for the application pool is set to 4.0.However I noticed the following:
1- When I accessed this page remotely for the first time I got a browser "Login" popping up, although there should be no authentication here at all
2- The error page shows at the bottom "Version Information: Microsoft .NET Framework Version: 2.0, ASP.NET Version: 2.0 " although I've set the application pool to 4.0
What could be the problem ?
A couple things to try
Make sure there is not a duplicate site in IIS that is capturing the request
Restarting IIS is never a bad option
Make the web.config itself is set to target framework 4.0 and not 2.0
Usually when this happens where it works fine locally but not when deployed it always turns out to be the third item, a web.config configuration mis-match. Hope this helps!
I had this problem.
another solution can be changing the Application Pool settings:
go to the application pool related to your application. Click advanced settings. Change the "Enable 32-Bit Application"
I just ran into this response, and turns out it was caused by a StackOverflowException inside the action that supposedly could not be found. I was able to see this by attaching to IIS using the visual studio debugger. Go figure. I was doing a POST though.
As Seany84 explained in their comment above, if you have migrated from to 2.0 to 4.0, most probably your webconfig contains some tags that are incompatible with new version. In my case there was an 'applicationSettings' section that caused the problem. After removing this tag from webconfig my webservis started to run properly.
When you get
The resource cannot be found.
error on the server but it works fine locally - it could be caused by your server running out of disk space. Navigate to the server and check directory structure to see if the file exists. Also check your log messages for more details.
Folder Permissions on wwwroot.
Add IUSR with (Read & execute , Read)
Add (machine name)\ IIS_IUSRS (Read & execute , Read)
If IIS doesn't have permissions to access the file, you will be blocked
I had this problem and i fix it following way,
Make sure you don't have any errors in web config,
For finding error goto
IIS > your application >Manage Application > browse
A page will open in internet explorer,
You will find error here, fix it and restart application it will work
I was able to resolve my issue by leaving the IIS Site Bindings 'Host Name' blank.
I have tried all the answers all of them are useful. But in my case after changing these settings Restarting my machine (not just the IIS). worked for me
I'm really new to setting up web servers in general. I've got IIS 8 on Windows 8, and I'm trying to set up a little site locally, while doing some development. In IIS I choose Add Site, give a name, points to a location where I have a index.html file (I've tried different locations, latest in a c:\inetpub\wwwroot\test -folder) and otherwise use all default settings. However, when I try to browse to localhost I get
HTTP Error 503. The service is unavailable.
I've verified the pool is started, and I've given IIS_IUSRS Full Control on the target folder
I've search around but not found anything that solved my issue, and there's nothing helpfull in the EventLog or in the C:\Windows\System32\LogFiles\HTTPERR folder
Could anyone tell me what's wrong?
It could be that the user identity is outdated, especially if you've tried starting a stopped app pool and the next request again fails.
In IIS, go to the Application Pools under the Server, then find the correct Application Pool for your web site, and click on it. On the Advanced Settings menu to the right, select Identity and change it and enter new user and password. Click on your Application Pool again, and select Recycle to restart it.
You can also try looking at the error message in Event Viewer, under Windows Logs, Application, Details tab.
Other answers are fine. But in my case, I was working on a Windows box that already was running some old IIS, IISExpress or any other web site. What happened is urls ACLs where reserved somehow in the system. So, you might want to check this.
Here is the console command to dump all URL acls:
netsh http show urlacl
Check what's returned here, and if anything matches the url you are testing, here is the command to delete one URL acl (for example):
netsh http delete urlacl url=http://localhost:2018/
(beware to carefully note what you do here in case it was not related to the original problem)
In my case the problem was the DefaultAppPool. I changed the "Load User Profile" to false and now it works. However, I don't know if there are side effects to this.
Further reading on setting the Load User Profile option: What exactly happens when I set LoadUserProfile of IIS pool?
Check your application's respective Application Framework Pool - it could be stopped. If it is, start it and check again.
If you're still experiencing issues you can also check out Event Viewer to find the cause of that error in order to troubleshoot more.
If the app pool is running under some specific user identity, then go to the advanced settings and update the username and password again to ensure they are correct.
If the app pool immediately stops after you start it and your event log shows:
The worker process for application pool 'APP_POOL_NAME' encountered an
error 'Cannot read configuration file ' trying to read configuration
data from file '\?\', line number '0'. The data field contains
the error code.
... you may experiencing a bug that was apparently introduced in the Windows 10 Fall Creators Update and/or .Net Framework v4.7.1. It can be resolved via the following workaround steps, which are from this answer to the related question Cannot read configuration file ' trying to read configuration data from file '\\?\<EMPTY>', line number '0'.
Go to the drive your IIS is installed on, eg. C:\inetpub\temp\appPools\
Delete the directory (or virtual directory) with the same name as your app pool.
Recycle/Start your app pool again.
I have reported this bug to Microsoft by creating the following issue on the dotnet GitHub repo: After installing 4.7.1, IIS AppPool stops with "Cannot read configuration file".
EDIT
Microsoft responded that this is a known issue with the Windows setup process for the Fall Creators Update and was documented in KB 4050891, Web applications return HTTP Error 503 and WAS event 5189 on Windows 10 Version 1709 (Fall Creators Update). That article provides the following workaround procedure, which is similar to the one above. However, note that it will recycle all app pools regardless of whether they are affected by the issue.
Open a Windows PowerShell window by using the Run as administrator
option.
Run the following commands:
Stop-Service -Force WAS
Remove-Item -Recurse -Force C:\inetpub\temp\appPools\*
Start-Service W3SVC
Or if none of the current solutions work, look in your website's directory for a file called app_offline.htm. That basically tells IIS that your site is unavailable and to show this page instead.
To fix it, either delete it or rename it to app_offline.htm.bak.
In my case, I added it while showing a colleague how to use that to prevent traffic to the site temporarily and then forgot that I did that on my box. Sigh.
Start by looking in Event Viewer, either under the System or the Application log.
In my case the problem was that no worker process could be started for the App Pool because its configuration file couldn't be read - I had included an extra '.' at the end of its name.
I resolved this issue by removing a URL reservation that matched my app directory in IIS. I had a similar (definitely not the same) issue as outlined in this article:
A Not So Common Root Cause for 503 Service Unavailable
It is possible that your domain requires the account used for running the AppPool to have batch logon rights. In which case you will see this same error message. The way you can tell if that is the case, is by looking at the System events in the Event Viewer. There should be an event saying that the account being used with the App Pool has either 'the wrong password or does not have batch logon rights'.
This is why developers quite often use IIS Express on their development machine, since it by passes the batch logon rights issue.
I ran into the same issue, but it was an issue with the actual site settings in IIS.
Select Advanced Settings... for your site/application and then look at the Enabled Protocols value. For whatever reson the value was blank for my site and caused the following error:
HTTP Error 503. The service is unavailable.
The fix was to add in http and select OK. The site was then functional again.
For my case, My Default Application Pool was offline.
To troubleshoot the problem, I checked the IIS logs located in C:\Windows\System32\LogFile\HTTPERR. Scroll down to the most recent error logs, this will show you problems with IIS if any.
My Error was "503 1 AppOffline DefaultPool"
Solution
Open IIS Manager
Click on Application Pools, this lists all application pool to your right.
Check if the application pools hosting your api or site has a stop sign on it. If so, right click the application pool and click start.
Try again to access your service from the client
Check Event Viewer - Windows - Application. If there is a red Error line made from IIS-W3SVC-WP and the message is like The Module DLL C:\Windows\system32\inetsrv\rewrite.dll failed to load. The data is the error. then you are missing some Windows Setup features.
In Windows Server 2012 go to Server Manager, Add Roles and Features, Web Server (IIS) and add the matching feature. Usually, most of the Application Development section is installed. Here is a complete list of IIS features and their associated DLL to help in diagnosis.
After going through a few iterations of that I ended on the error message above regarding "rewrite.dll". This led to a direct download and install of Microsoft URL Rewrite tool. Finally all websites came to life.
Our server ran out of disk space on Sunday afternoon which led to an application suddenly failing and returning HTTP error 502. The logs were empty so it had to be something that was occurring before IIS even did anything.
A swift look at the event viewer(WIN+R > eventvwr) exposed the issue.
It's a good idea to filter out the output of the System and Application windows to WAS since it can get pretty verbose in there.
The application depended on another one which was disabled. Therefore keep in mind an application can go down indirectly if one of it's dependent processes has gone down. We simply re-enabled the .NET application pool and our other application started running normally again.
If you have IIS URL Rewriting installed it could be to do with that. I suffered issues after a Windows 10 Update.
This StackOverflow post helped me.
Go to Windows Control Panel > Programs and Features > IIS URL Rewrite Module 2 > Repair.
i see this error after install url rewrite module i try to install previous version of it from:
https://www.microsoft.com/en-us/download/details.aspx?id=7435
it fixed my error
In my case, the problem was that another application was using the port that I had bound to my web site.
I found it by running the following command from a command line, which lists all of the listening ports and the executable involved:
netstat -b
If you have McAfee HIPS and if you see the following error in event viewer application log:
The Module DLL C:\Windows\System32\inetsrv\HipIISEngineStub.dll failed to load.
The data is the error.
Then this workaround on McAfee.com resolved the issue in my case.
Quote from the page:
Click Start, Run, type explorer and click OK.
Navigate to: %windir%\system32\inetsrv\config
Open the file applicationHost.config as Administrator for editing in Notepad.
Edit the <globalModules> section and remove the following line:
<add name="MfeEngine" image="%windir%\System32\inetsrv\HipIISEngineStub.dll" />
Edit the <modules> section and remove the following line:
<add name="MfeEngine" />
After you have finished editing the applicationHost.config file, save the file, then restart the IIS server using iisreset or by restarting the system.
Actually, in my case https://localhost was working, but http://localhost gave a HTTP 503 Internal server error. Changing the Binding of Default Web Site in IIS to use the hostname localhost instead of a blank host name.
tname for http binding
This could also happen if any recent installs or updates happened with .NET framework and/or ASP.NET. If you are unsure of what happened recently and if all your apps use ASP.NET version 4, you can try reset them by running the following commands in command prompt in administrator mode.
cd C:\Windows\Microsoft.NET\Framework64\v4.0.30319
aspnet_regiis -i
This makes sure to install or reinstall ASP.NET 4 and updates existing applications to use ASP.NET 4 version of the app pool. It updates both IIS Classic and Integrated mode handlers and script mappings in the IIS metabase. It also recreates ASP.NET v4.0 and ASP.NET v4.0 Classic app pools, and sets .NET framework 4 to DefaultAppPool and Classic .NET app pools.
I changed the port from 80 to 8080, that's why this error occur. I write localhost/ in search bar then this error occur. My problem is resolved by writing localhost:8080/ in the search then local host open.
This happened to me on a server on our intranet. After browsing through blog posts and Windows logs, it turned out that a few days before Christmas 2015 (related to a Windows Update?) my web site application pool wanted to create a config file in folder c:\inetpub\temp\appPools, but access to this folder was restricted. This caused the application pool to be disabled.
After adding Full control to Everyone on this temp folder, I restarted the Windows Process Activation Service and everything went online again.
If I'd been a little more elegant, it would probably had been enough to grant the AppPool user full control to the folder, but I never seem to remember how the app pool name and app pool user relates to eachother...
Same thing with IIS Express 10.0 after upgrading Windows 7 to Windows 10.
Solution: go to IIS and enable all disabled websites and reinstall ASP.NET Core.
Also check the address bar and make sure the page is in the right location.
This error can be returned instead of the 404 (Page not found). In my case, it was a bad link on the page that didn't have a subfolder included.
I was having this problem when cleaning up my IIS on dev machine, and I had somehow created a virtual folder for a subfolder of my actual development web that I couldn't clear and was creating conflicts.
To clear it I had to use
C:\Windows\System32\inetsrv\appcmd.exe list vdir
and then individually remove the problem virtual directories using
C:\Windows\System32\inetsrv\appcmd.exe delete app /app.name:"Default Web Site"/{name of virtual directory}
For me the solution is to change Enable 32-bit Applications to False
None of the answers worked for me. So I'd like to share what I found after hours of research..
Keep seeing this message from event logs: The Module DLL C:\Windows\system32\RpcProxy\RpcProxy.dll failed to load. The data is the error. Turns out that dll is 64bit and cannot be loaded into 32bit process.
You can also try the following.
Right-click on the site and 'Basic Settings...'
Click on 'Connect As...'
Click on Specific User and give the new credentials.
Now it should work.
In my case, I had to change my userPass of network because company policies. So, you need to edit your AppPool:
click on Application Pools. Select your pool, 'advanced Settings...' go to 'Process Model' click on 'Identity' and Click on Specific User and give the new credentials.
This might be because of number of connections to the database. I had such a situation and so, wrote a de-constructor and killed db open connection and it resolved.
I had the same problem and found it was caused by permission problems creating the user profile in C:\Users. I gave ApplicationPoolIdentity full permissions to the C:\Users folder, started the site and everything worked, the profile must have been created properly, and my site worked as it should. I then removed access to C:\Users from ApplicationPoolIdentity.
Site wont start on local using ApplicationPoolIdentity, only when using NetworkService: "HTTP Error 503. The service is unavailable."
I am trying to host my web application in IIS7 (for testing purposes). I have checked tutorials how to do it, they are very similar, but i always get some errors. I guess i'm missing something, hope you could help me.
Things that i have now:
1. Installed IIS7 with asp net (the IIS welcome image is showing, so i guess its installed correctly)
2. Simple web application (only with Default.aspx and some other automatically generated files)
I'm using tutorials like this one:
http://www.codeproject.com/Articles/28693/Deploying-ASP-NET-Websites-on-IIS-7-0
For those who may not want to click the link, here are the steps of this tutorial (just with mages and some additional info):
Step 1: From Visual Studio, publish your Web application.
Step 2: Copy the published application folder to "C:\intepub\wwwroot" [default] folder.
Step 3: From RUN - > inetmgr -> OK
"TestWeb" is a recently pasted webapplication on your wwwroot folder.
Step 4: We need to convert it to an application, just right click and then Click on "ConvertToApplication" as shown in the following picture:
+ How to create and assign application pools
Now about the errors i get when i'm trying to connect to the running Sample website:
1. If I'm using Framework 4.0 integrated application pool:
HTTP Error 500.21 - Internal Server Error
Handler "PageHandlerFactory-Integrated" has a bad module "ManagedPipelineHandler" in its module list
2. If I'm using Framework 4.0 Classic application pool:
HTTP Error 404.17 - Not Found
The requested content appears to be script and will not be served by the static file handler.
My guess is that something could be configured wrong in IIS7 or i might be publishing my web application not the way it has to be published, because they differ in tutorials that i am using. For now i am publishing, using File System option. Is it the right one for IIS7?
Hope anyone could explain me my mistakes.
Thanks, Walt
The answer for the questioner was to run the aspnet_regiis.exe -i from the framework directory
Below suggestions and comments leading to this answer :
I never had problems when publishing websites and webservices on IIS7 (for the moment) but I did a little research and according to the following link : http://forums.asp.net/post/3225843.aspx
It is suggested that after switching the AppPool to Classic .NET AppPool, it may be required for you to uncomment a section in the web.config which is necessary for IIS7
Did you try that ?
For number HTTP:500.21 check this asp.net forum
"Looks like you have not installed the asp.net feature from within IIS in "Add/Remove windows component" so that all the regstration needed to run asp.net is not present in your configuration." from the page.
For number 404.17 please check the asp.net module if properly installed or not. If not then you might have to install manually. Check this thread.
Hey I got problem in running .NET framework 4.0 website on IIS7.0.
the error I got is like:
HTTP Error 404.2 - Not Found "The page you are requesting cannot be served because of the ISAPI and CGI Restriction list settings on the Web server".
Module : IsapiModule ,
Notification : ExecuteRequestHandler,
Handler : PageHandlerFactory-ISAPI-4.0_32bit ,
Error Code : 0x800704ec
Go to IIS manager and click on the server name. Then click on the "ISAPI and CGI Restrictions" icon under the IIS header. Change ASP.NET 4.0 from "Not Allowed" to "Allowed".
If you look in the ISAPI And CGI Restrictions, and everything is already set to Allowed, then make sure that the ASP.NET v4.0.30319 handlers are even in the list. In my case they were not. This can be easy to overlook.
I added one for 32 %windir%\Microsoft.NET\Framework\v4.0.30319\aspnet_isapi.dll and another for 64 bit %windir%\Microsoft.NET\Framework64\v4.0.30319\aspnet_isapi.dll. You can name them both the same ASP.NET v4.0.30319.
Check Allow extension path to execute.
Go to the IIS Manager.
open the server name like (PC-Name)\.
then double click on the ISAPI and CGI Restriction.
then select ASP.NET v4.0.30319(32-bit) Restriction allowed.
In my case, the problem was more severe: turns out asp.net was not correctly registered.
This response worked fine.
simply ran the following command at the command prompt
%windir%\Microsoft.NET\Framework64\v4.0.30319\aspnet_regiis.exe -i
If I had been on a 32 bit system, it would have looked like the following:
%windir%\Microsoft.NET\Framework\v4.0.21006\aspnet_regiis.exe -i
Step 1: Open IIS and click the server name
Step 2. Double click “ISAPI and CGI Restrictions”
Step 3. Right click ASP.NET v4.0.30319 and select “allow”
After
Stopping and Starting the World Wide Web Publishing Service
1.Go to Start > All Programs > Administrative Tools > Services.
2.In the services list, right-click World Wide Web Publishing Service, and then click Stop (to stop the service), Start (to start it after it has been stopped), or Restart (to restart the service when it is running).
Pramesh
If you are running Delphi, or other native compiled CGI, this solution will work:
As other pointed, go to IIS manager and click on the server name. Then click on the "ISAPI and CGI Restrictions" icon under the IIS header.
If you have everything allowed, it will still not work. You need to click on "Edit Feature Settings" in Actions (on the right side), and check "Allow unspecified CGI modules", or "Allow unspecified ISAPI modules" respectively.
Click OK
In our case the solution to this problem did not involve the "ISAPI and CGI Restrictions" settings. The error started occuring after operations staff had upgraded the server to .NET 4.5 by accident, then downgraded to .NET 4.0 again. This caused some of the IIS websites to forget their respective correct application pools, and it caused some of the application pools to switch from .NET Framework 4.0 to 2.0. Changing these settings back fixed the problem.
If you look in the ISAPI And CGI Restrictions, and everything is already set to Allowed, and the ASP.NET installed is v4.0.30319, then in the right, at the "Actions" panel click in the "Edit Feature Settings..." and check both boxes. In my case, they were not.
Try changing the AppPool Manged Pipeline Mode from "Integration" to "Classic".
Depending on the type of application, another thing to check is under the Advanced Settings for the Application Pool make sure "Enable 32-Bit Applications" is set to True.
I'd checked everything in this thread when I had this issue but all had already been setup correctly, I found this was the problem for me.
If you don't have ISAPI and CGI Restrictions option listed, here is how to add it. How to add ISAPI and CGI Restrictions
After mapping of Application follow these steps
Open IIS
Click on Applications Pools
Double click on website
Change Manage pipeline mode to "classic"
click Ok.
Ow change .Net Framework Version to Lower version
Then click Ok