Fatal error: Uncaught Error: Class "OCA\RelatedResources\Db\CoreQueryBuilder" not found in /var/www/html/nextcloud/apps/related_resources/lib/Db/CalendarShareRequestBuilder.php:18 Stack trace: #0 {main} thrown in /var/www/html/nextcloud/apps/related_resources/lib/Db/CalendarShareRequestBuilder.php on line 18