Fatal error: Uncaught Error: Class 'Symfony\Component\DependencyInjection\Extension\Extension' not found in D:\workspaces\liZiPingBack\vendor\symfony\web-profiler-bundle\DependencyInjection\WebProfilerExtension.php:35 Stack trace: #0 {main} thrown in D:\workspaces\liZiPingBack\vendor\symfony\web-profiler-bundle\DependencyInjection\WebProfilerExtension.php on line 35