Fatal error: Uncaught Error: Class 'PHP_CodeSniffer\Tests\Standards\AbstractSniffUnitTest' not found in /home/discovergreece/public_html/vendor/squizlabs/php_codesniffer/src/Standards/Generic/Tests/Debug/CSSLintUnitTest.php:20 Stack trace: #0 {main} thrown in /home/discovergreece/public_html/vendor/squizlabs/php_codesniffer/src/Standards/Generic/Tests/Debug/CSSLintUnitTest.php on line 20