Fatal error: Uncaught Error: Class 'Symfony\Component\VarDumper\Caster\ConstStub' not found in /opt/lampp/htdocs/vendor/symfony/var-dumper/Caster/LinkStub.php:19 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/vendor/symfony/var-dumper/Caster/LinkStub.php on line 19