Fatal error: Uncaught Error: Class "OCP\AppFramework\Middleware" not found in /home/tremblinlu/MyNextCloud/nextcloud/lib/private/AppFramework/Middleware/Security/SecurityMiddleware.php:69 Stack trace: #0 {main} thrown in /home/tremblinlu/MyNextCloud/nextcloud/lib/private/AppFramework/Middleware/Security/SecurityMiddleware.php on line 69