[SOLVED] unfortunately the process android.process.acore has stopped
Inbetween the clicking of the "OK" to close the annoying pop-ups, you have to manage to get to the important place to clear "Contacts Storage" Data:
Menu => Settings => Apps => the Right Tab "All" => Contacts Storage
There you have to click on the "
Clear Data" and by a miracle the problem is instantly solved! :good: