Fatal error: Uncaught Error: Class 'Symfony\Component\VarDumper\Caster\ConstStub' not found in /var/www/html/test-project/my-app/vendor/symfony/var-dumper/Caster/ClassStub.php:21 Stack trace: #0 {main} thrown in /var/www/html/test-project/my-app/vendor/symfony/var-dumper/Caster/ClassStub.php on line 21