Fatal error: Uncaught Error: Class "Metadata\ClassMetadata" not found in /var/www/crm_killing_ninja/vendor/jms/metadata/src/MergeableClassMetadata.php:7 Stack trace: #0 {main} thrown in /var/www/crm_killing_ninja/vendor/jms/metadata/src/MergeableClassMetadata.php on line 7