.Popbackstack () fragmentation issue;

could not solve the problem with Fragments back stack. When I try to pop up it throws errors:

Could not find class 'android.support.v4.app.FragmentTransitionCompat21 $ 1' referenced by android.support.v4.app.FragmentTransitionCompat21.setEpicenter class Could not find class 'android.support.v4.app.FragmentTransitionCompat21 $ 3', on which is referenced by android.support.v4.app.FragmentTransitionCompat21.setSharedElementEpicenter method

and when pressed again, it will work.

My code:

FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.fragment_place, fragment, fragmentTag);
fragmentTransaction.addToBackStack(null);
fragmentTransaction.commit();

      

        
        
        
      

    

Pop:

int stackCount = getSupportFragmentManager().getBackStackEntryCount();
if (stackCount > 0) {
    getSupportFragmentManager().popBackStackImmediate();
}