First, of course, make sure that your launch.json file is correct.
If you are completely sure about this, maybe check your AL extension version, or even better try to install the version of vsix file manually from your installation DVD to exactly match the version of your AL Code extension in Visual Studio code.
We had this internally with one of our DEVs "An internal error has occured" when Debugging and I would like to prove that this procedure with manually installing VSIX was actually the lifesaver.
Answers
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If you are completely sure about this, maybe check your AL extension version, or even better try to install the version of vsix file manually from your installation DVD to exactly match the version of your AL Code extension in Visual Studio code.
Also, try running vscode in the server. This way you can exclude any network related issues.
check also your app.json if it says:
"target": "Internal",
I would be really interested to know if it would work.
You would of course just have to locate ModernDev folder on your installation DVD in order to find thatVSIX. By installing your AL Language extension this way you will exactly match the version of your BC. (This is also sometimes needed with Docker: https://community.dynamics.com/business/b/mohanasdynamicsnavblog/posts/how-to-install-al-language-extension-using-vsix-file)
We had this internally with one of our DEVs "An internal error has occured" when Debugging and I would like to prove that this procedure with manually installing VSIX was actually the lifesaver.
Thanks
I'm experiencing same problem not only with win auth, but NavUserPassword also.
Did you received any news from MS?
And also remember to restart VSC, not only BC service