Fatal error: Uncaught Error: Class "Symfony\Component\Routing\Generator\Dumper\GeneratorDumper" not found in C:\Apache24\htdocs\cms_upgrade\vendor\symfony\routing\Generator\Dumper\CompiledUrlGeneratorDumper.php:23 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\cms_upgrade\vendor\symfony\routing\Generator\Dumper\CompiledUrlGeneratorDumper.php on line 23