Fatal error: Uncaught Error: Class "Symfony\Component\VarDumper\Dumper\AbstractDumper" not found in C:\WebServer\htdocs\bookshelf\vendor\symfony\var-dumper\Dumper\CliDumper.php:23 Stack trace: #0 {main} thrown in C:\WebServer\htdocs\bookshelf\vendor\symfony\var-dumper\Dumper\CliDumper.php on line 23