Fatal error: Uncaught Error: Class "ApiPlatform\Serializer\AbstractCollectionNormalizer" not found in /home/creantis/840suite.creantis.dev/840suite01/vendor/api-platform/core/src/Hal/Serializer/CollectionNormalizer.php:29 Stack trace: #0 {main} thrown in /home/creantis/840suite.creantis.dev/840suite01/vendor/api-platform/core/src/Hal/Serializer/CollectionNormalizer.php on line 29