IntelliJ can't see Android SDK classes

Question

I have problems from time to time with my Android ItelliJ projects. When I start, IntelliJ does not recognize the Android classes and shows compiler errors. Project dependencies look good.

I use a workaround for this, which is related to setting up a new Android SDK in the project. This, of course, is not optimal, and now this also fails.

Does anyone else experience this?

Answer 1

Solved using files / invalid caches. There is no idea what upsets the environment.