Fatal error: Uncaught Error: Class 'Metadata\ClassMetadata' not found in /home/users/00/3c/21/home/www/vendor/jms/metadata/src/MergeableClassMetadata.php:7 Stack trace: #0 {main} thrown in /home/users/00/3c/21/home/www/vendor/jms/metadata/src/MergeableClassMetadata.php on line 7