Fatal error: Uncaught Error: Class 'Symfony\Flex\Configurator\AbstractConfigurator' not found in D:\workspaces\liZiPingBack\vendor\symfony\flex\src\Configurator\GitignoreConfigurator.php:21 Stack trace: #0 {main} thrown in D:\workspaces\liZiPingBack\vendor\symfony\flex\src\Configurator\GitignoreConfigurator.php on line 21