Fatal error: Uncaught Error: Class 'Symfony\Component\Config\Definition\Exception\Exception' not found in D:\workspaces\liZiPingBack\vendor\symfony\config\Definition\Exception\InvalidDefinitionException.php:19 Stack trace: #0 {main} thrown in D:\workspaces\liZiPingBack\vendor\symfony\config\Definition\Exception\InvalidDefinitionException.php on line 19