Fatal error: Uncaught Error: Class "PhpCsFixer\RuleSet\RuleSet" not found in /home/vivliari/public_html/presta-validator/vendor/friendsofphp/php-cs-fixer/src/RuleSet.php:25 Stack trace: #0 {main} thrown in /home/vivliari/public_html/presta-validator/vendor/friendsofphp/php-cs-fixer/src/RuleSet.php on line 25