android.support.v4.app.getFragmentManager() returns null?

Question

This is my Stacktrace:

FATAL EXCEPTION: main
java.lang.NullPointerException
at com.example.test.fragments.LoadingFragment$1.run(LoadingFragment.java:66)
at a         


        

Answer 1

After cleaning and rebuilding my project aswell as restarting my testing device, this worked again somehow.