There are multiple other posts reporting this, but they are related to javascript frameworks, etc.
I get this error when opening any .php
extension file and the error pops up at the top and it always blocks the tabs, very annoying.
Similar posts, but does not solve:
check your config file (F1 + config and select settings json) and search for:
I have the same error and it was because I have pointing to the wrong file:
it must point to (in my case):