Fatal error: Uncaught Error: Class "Symfony\Component\DependencyInjection\Dumper\Dumper" not found in C:\Apache24\htdocs\cw\vendor\symfony\dependency-injection\Dumper\YamlDumper.php:37 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\cw\vendor\symfony\dependency-injection\Dumper\YamlDumper.php on line 37