I am new to kha, I meet this problem when starting KodeStudio, and autocompelete not working:
Haxe language server started with Kha at E:/app/KodeStudio-win32/resources/app/extensions/kha/Kha
Initializing completion cache...
Failed - try fixing the error(s) and restarting the language server:

Try fixing the errors then - when you compile (ctrl+shift+b), does it show any?

I delete the user folder and restart, now is ok, thank you.

Now everytime I will do compile, it works.