How to fix WebSocket connection to 'ws:localhost:8125/' failed: Error in connection establishment: net::ERR_CONNECTION_REFUSED? - adobe-brackets

Coding in Brackets and working with JavaScript. When I go to Live Preview (and also using Enable Experimental Live Preview) to run code, this error message keeps coming up in Developer Tools (Chrome). How can I fix this?
I've tried other solutions from Stackoverflow but I'm uncertain as to how to resolve the problem. I'm kinda new to this, need someone to hold my hand through this or piece it together step by step.
Code is meaningless as it shows up in Live Preview accordingly. It's the error message under the the display that keeps coming up:

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Is there a way to resolve repeated server error problem in LaTex (Overleaf)?

I ran into this error while trying to compile my overleaf latex;
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Your response will be helpful. Thanks
This problem may arise as a result of the internet connection. The simple way to resolve this problem is to reload the Overleaf editor by refreshing your browser.

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Image showing the error obtained
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Error 3 Object reference not set to an instance of an object.
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Does version need to be live to check if TrustManager error is fixed?

I'm experiencing the problem
Your app is using an unsafe implementation of the X509TrustManager
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I needed to break my app's code to (i think) fix the problem. I need to know if the change is working, if so I'll fix the other problems the fix caused. If I upload the build to production using timed publishing but don't make the build live will it tell me if the error affects that build # in the popup error message?
Builds submitted using timed publishing will be flagged if they are affected.

trying to find cause of Flex "RPC Error" pop-up

I'm working with a Flex 4 application (MXML and ActionScript front-end using BlazeDS and Java back-end) and I am trying to find the origin of an error.
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I like to do my development in Firefox and using Firebug as a console. When the Flex app starts, open up Firebug and look at the Net tab. It will bring up all the RPC calls made while Flex is initializing, which can be very useful for these kinds of bugs.

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