Fatal error: Uncaught Error: Interface "PHP_CodeSniffer\Sniffs\Sniff" not found in C:\xampp\htdocs\vendor\squizlabs\php_codesniffer\src\Standards\Squiz\Sniffs\CSS\EmptyClassDefinitionSniff.php:18 Stack trace: #0 {main} thrown in C:\xampp\htdocs\vendor\squizlabs\php_codesniffer\src\Standards\Squiz\Sniffs\CSS\EmptyClassDefinitionSniff.php on line 18