Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestSuite' not found in /home/vivliari/public_html/presta-validator/vendor/squizlabs/php_codesniffer/tests/TestSuite.php:15 Stack trace: #0 {main} thrown in /home/vivliari/public_html/presta-validator/vendor/squizlabs/php_codesniffer/tests/TestSuite.php on line 15