Fatal error: Uncaught Error: Class 'Symfony\Component\HttpKernel\DataCollector\DataCollector' not found in /home/app/htdocs/message_gateway/vendor/symfony/http-kernel/Tests/Fixtures/DataCollector/CloneVarDataCollector.php:18 Stack trace: #0 {main} thrown in /home/app/htdocs/message_gateway/vendor/symfony/http-kernel/Tests/Fixtures/DataCollector/CloneVarDataCollector.php on line 18