Fatal error: Uncaught Error: Class "OCP\AppFramework\Middleware" not found in /usr/local/www/owncloud/apps/galleryplus-bak0/middleware/checkmiddleware.php:32 Stack trace: #0 {main} thrown in /usr/local/www/owncloud/apps/galleryplus-bak0/middleware/checkmiddleware.php on line 32