Fatal error: Uncaught Error: Class "Symfony\Component\Routing\Generator\Dumper\GeneratorDumper" not found in C:\mywamp\sites\allsite\calcomposer\vendor\symfony\routing\Generator\Dumper\PhpGeneratorDumper.php:20 Stack trace: #0 {main} thrown in C:\mywamp\sites\allsite\calcomposer\vendor\symfony\routing\Generator\Dumper\PhpGeneratorDumper.php on line 20