Fatal error: Uncaught Error: Class 'Symfony\Component\HttpKernel\DataCollector\DataCollector' not found in /home/eberhardschwarze/public_html/vendor/contao/core-bundle/src/DataCollector/ContaoDataCollector.php:26 Stack trace: #0 {main} thrown in /home/eberhardschwarze/public_html/vendor/contao/core-bundle/src/DataCollector/ContaoDataCollector.php on line 26