Fatal error: Uncaught Error: Class 'PhpCsFixer\RuleSet\AbstractMigrationSetDescription' not found in /home/www/cookbook/vendor/friendsofphp/php-cs-fixer/src/RuleSet/Sets/PHP54MigrationSet.php:22 Stack trace: #0 {main} thrown in /home/www/cookbook/vendor/friendsofphp/php-cs-fixer/src/RuleSet/Sets/PHP54MigrationSet.php on line 22