Fatal error: Uncaught Error: Class "Symfony\Component\Translation\Extractor\Visitor\AbstractVisitor" not found in D:\Apache24\www\gs1_taizhou\back\vendor\symfony\translation\Extractor\Visitor\TransMethodVisitor.php:20 Stack trace: #0 {main} thrown in D:\Apache24\www\gs1_taizhou\back\vendor\symfony\translation\Extractor\Visitor\TransMethodVisitor.php on line 20