Fatal error: Uncaught Error: Interface "Symfony\Component\VarDumper\Dumper\DataDumperInterface" not found in D:\Apache24\www\qilu\back-end\vendor\symfony\var-dumper\Dumper\AbstractDumper.php:22 Stack trace: #0 {main} thrown in D:\Apache24\www\qilu\back-end\vendor\symfony\var-dumper\Dumper\AbstractDumper.php on line 22