Fatal error: Uncaught Error: Class "App\Engine\LegacyHandler\LegacyHandler" not found in /var/www/crm_killing_ninja/core/backend/FieldDefinitions/LegacyHandler/LinkFieldDefinitionMapper.php:37 Stack trace: #0 {main} thrown in /var/www/crm_killing_ninja/core/backend/FieldDefinitions/LegacyHandler/LinkFieldDefinitionMapper.php on line 37