Fatal error: Uncaught Error: Interface "App\Extension\k3crmExt\backend\Services\LinkCheckerInterface" not found in /var/www/html/extensions/k3crmExt/backend/Services/LinkCheckerService.php:8 Stack trace: #0 {main} thrown in /var/www/html/extensions/k3crmExt/backend/Services/LinkCheckerService.php on line 8