Fatal error: Uncaught Error: Class "OCP\Activity\ActivitySettings" not found in /var/www/html/nextcloud/apps/dav/lib/CalDAV/Activity/Setting/CalDAVSetting.php:14 Stack trace: #0 {main} thrown in /var/www/html/nextcloud/apps/dav/lib/CalDAV/Activity/Setting/CalDAVSetting.php on line 14