This can be solved by updating the apps. When you open the Google Playstore app, you will see a search bar at the top of the screen. You will see your account in the search bar on the right. (often a colorful circle with a letter in it) You can click on that and that will open a new menu. In this menu you can open ''Manage apps and device''. Under the heading ''overview'' you will see various icons. You may click on the 4 small squares. Then click on ''Update apps'' after updating the contacts app should work again. In some cases it is necessary to reboot the phone for the above to take effect.