Fatal error: Uncaught Error: Class "PHP_CodeSniffer\Tests\Standards\AbstractSniffUnitTest" not found in C:\Apache24\htdocs\Quantum\vendor\squizlabs\php_codesniffer\src\Standards\Squiz\Tests\CSS\DisallowMultipleStyleDefinitionsUnitTest.php:19 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\Quantum\vendor\squizlabs\php_codesniffer\src\Standards\Squiz\Tests\CSS\DisallowMultipleStyleDefinitionsUnitTest.php on line 19