Fatal error: Uncaught Error: Interface 'Symfony\Component\VarDumper\Dumper\DataDumperInterface' not found in /opt/lampp/htdocs/vendor/symfony/var-dumper/Dumper/ContextualizedDumper.php:20 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/vendor/symfony/var-dumper/Dumper/ContextualizedDumper.php on line 20