Fatal error: Uncaught Error: Class 'Metadata\MergeableClassMetadata' not found in /home/spadates/www/win4u.test/vendor/jms/security-extra-bundle/JMS/SecurityExtraBundle/Metadata/ClassMetadata.php:32 Stack trace: #0 {main} thrown in /home/spadates/www/win4u.test/vendor/jms/security-extra-bundle/JMS/SecurityExtraBundle/Metadata/ClassMetadata.php on line 32