If VSCode and VS C++ IntelliSense is not working or picking up libraries, and you see error Cannot open source file, follow the solutions mentioned in this post.

Switch to a branch where the file open has been deleted. Vscode shows this: the extension pops up a panic error.

I'm having trouble with the VSCode previewer and code completion (I primarily want the code completion). When trying to code complete, I get the message 'Build the project', pressing enter does ...