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