Fatal error: Uncaught Error: Class "PHP_CodeSniffer\Files\File" not found in I:\www\frameworks\Symfony\doctrine\vendor\squizlabs\php_codesniffer\src\Files\DummyFile.php:20 Stack trace: #0 {main} thrown in I:\www\frameworks\Symfony\doctrine\vendor\squizlabs\php_codesniffer\src\Files\DummyFile.php on line 20