Fatal error: Uncaught Error: Class "OCP\AppFramework\Db\Entity" not found in /var/www/html/nextcloud/apps/dav/lib/CalDAV/Proxy/Proxy.php:22 Stack trace: #0 {main} thrown in /var/www/html/nextcloud/apps/dav/lib/CalDAV/Proxy/Proxy.php on line 22