Sharepoint development using PowerShell - asp.net

Question

I'm trying to create sharepoint webparts using powershell. But each time I loads (Context.Load()) something, I'm getting errors.
Here is my code.
[Reflection.Assembly]::LoadFile(([System.Reflection.Assembly]::LoadWithPartialName("Microsoft.SharePoint.Client").location))
[Reflection.Assembly]::LoadFile(([System.Reflection.Assembly]::LoadWithPartialName("Microsoft.SharePoint.Client.runtime").location))
$tenantAdmin = "######ajoncloud.onmicrosoft.com"
$tenantAdminPassword = "#########"
$secureAdminPassword = $(convertto-securestring $tenantAdminPassword -asplaintext -force)
$siteURL = "https://ajoncloud.sharepoint.com/LND"
$ctx = New-Object Microsoft.SharePoint.Client.ClientContext($siteUrl)
$credentials = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($tenantAdmin,$secureAdminPassword)
$ctx.Credentials = $credentials
This part is working completely fine. But if I try the following statements, I get errors.
$web = $ctx.Web
$ctx.Load($web)
$ctx.ExecuteQuery()
This is the error I'm getting.
Exception calling "ExecuteQuery" with "0" argument(s): "The remote server returned an error: (403) Forbidden."

Answer 1

Your code is working fine when I try it myself. Maybe try the below piece of code and try to obtain a specific piece inside your SharePoint. Specify a certain list and try to obtain the fieldvalues. At first I got an error when running your code, but when I tried a different user and specified the below list it started working for both users.
[Reflection.Assembly]::LoadFile(([System.Reflection.Assembly]::LoadWithPartialName("Microsoft.SharePoint.Client").location))
[Reflection.Assembly]::LoadFile(([System.Reflection.Assembly]::LoadWithPartialName("Microsoft.SharePoint.Client.runtime").location))
$tenantAdmin = "your admin account"
$tenantAdminPassword = "your admin password"
$secureAdminPassword = $(ConvertTo-SecureString $tenantAdminPassword -AsPlainText -Force)
$siteURL = "your site/subsite"
$ctx = New-Object Microsoft.SharePoint.Client.ClientContext($siteUrl)
$ctx.credentials = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($tenantAdmin,$secureAdminPassword)
$listTitle = "The name of your list"
$list = $ctx.Web.Lists.GetByTitle($listTitle)
$fields = $list.Fields
$qry = [Microsoft.SharePoint.Client.CamlQuery]::CreateAllItemsQuery(10000,'ID','Created','Modified','Title')
$items = $list.GetItems($qry)
$ctx.Load($fields)
$ctx.Load($items)
$ctx.ExecuteQuery()
foreach($item in $items){
$item.FieldValues.Title
}