Fatal error: Uncaught Error: Interface "OCP\Migration\ISchemaMigration" not found in /users/ms-it/www/oc/apps/notifications/appinfo/Migrations/Version20180119080933.php:7 Stack trace: #0 {main} thrown in /users/ms-it/www/oc/apps/notifications/appinfo/Migrations/Version20180119080933.php on line 7