java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState with DialogFragment

Here is the answer in another thread:

Actions in onActivityResult and “Error Can not perform this action after onSaveInstanceState”

also here:

Refreshing my fragment not working like I thought it should

This is an example solving this problem:

DialogFragment loadingDialog = createDialog();

FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
                    transaction.add(loadingDialog, "loading");
                    transaction.commitAllowingStateLoss();