Fatal error: Uncaught Error: Class "OCP\Migration\BigIntMigration" not found in /home/tzuovhm/tzuovhm/nextcloud/apps/activity/lib/Migration/Version2006Date20170919095939.php:13 Stack trace: #0 {main} thrown in /home/tzuovhm/tzuovhm/nextcloud/apps/activity/lib/Migration/Version2006Date20170919095939.php on line 13