Fatal error: Uncaught Error: Interface "OCP\Migration\ISchemaMigration" not found in /users/ms-it/www/oc/apps/files_sharing/appinfo/Migrations/Version20170830112305.php:28 Stack trace: #0 {main} thrown in /users/ms-it/www/oc/apps/files_sharing/appinfo/Migrations/Version20170830112305.php on line 28