Fatal error: Uncaught Error: Class "OCP\AppFramework\Middleware" not found in /home/tzuovhm/tzuovhm/nextcloud/lib/private/AppFramework/Middleware/Security/CSPMiddleware.php:20 Stack trace: #0 {main} thrown in /home/tzuovhm/tzuovhm/nextcloud/lib/private/AppFramework/Middleware/Security/CSPMiddleware.php on line 20