I discovered what’s wrong with, that You can’t use UI design feature in newest update of Aide/xml for the moment. It is the textView that gives this error.
Quick solution:
Delete the textview in layout 's or don’t use it when designing. Not a good solution for already apps with a lots of textview’s thow!
I hope the developers see this bug and correct it, so we can use ui design again. I have a project upcoming, and because of my Aura Migraine I don’t want to use Android Studio because of that. Aide is more smart for developing apps.
/Bob