Fatal error: Uncaught Error: Interface "App\ViewDefinitions\LegacyHandler\SubpanelButtonMapperInterface" not found in /var/www/crm_killing_ninja/core/backend/ViewDefinitions/LegacyHandler/Subpanel/CreateButtonMapper.php:36 Stack trace: #0 {main} thrown in /var/www/crm_killing_ninja/core/backend/ViewDefinitions/LegacyHandler/Subpanel/CreateButtonMapper.php on line 36