Fatal error: Uncaught Error: Class "OCP\AppFramework\Middleware" not found in /home/tzuovhm/tzuovhm/apps_/federation/lib/Middleware/AddServerMiddleware.php:19 Stack trace: #0 {main} thrown in /home/tzuovhm/tzuovhm/apps_/federation/lib/Middleware/AddServerMiddleware.php on line 19