Fatal error: Uncaught Error: Interface "OCP\Migration\ISchemaMigration" not found in /users/ms-it/www/oc/apps/notifications/appinfo/Migrations/Version20170801152524.php:11 Stack trace: #0 {main} thrown in /users/ms-it/www/oc/apps/notifications/appinfo/Migrations/Version20170801152524.php on line 11