Fatal error: Uncaught Error: Interface "OCA\Contacts\Service\Social\ISocialProvider" not found in /home/tzuovhm/tzuovhm/apps_/contacts/lib/Service/Social/FacebookProvider.php:12 Stack trace: #0 {main} thrown in /home/tzuovhm/tzuovhm/apps_/contacts/lib/Service/Social/FacebookProvider.php on line 12