Intellij Content is not allowed in prolog

Question

I run Intellij, and when I try to run an android app, I always have an internal error: Content is not allowed in prolog. I think that I have tried everything to fix it, but

Answer 1

Check first line of xml files in .idea folder. Remove their content if error is given by intellij. They will be regenerated by intellij. And everything will work fine then.