Fatal error: Uncaught Error: Class 'Symfony\Component\VarDumper\Cloner\Stub' not found in D:\workspaces\liZiPingBack\vendor\symfony\var-dumper\Caster\DsPairStub.php:19 Stack trace: #0 {main} thrown in D:\workspaces\liZiPingBack\vendor\symfony\var-dumper\Caster\DsPairStub.php on line 19