Fatal error: Uncaught Error: Class 'PhpCsFixer\AbstractFixer' not found in /home/www/cookbook/vendor/friendsofphp/php-cs-fixer/src/Fixer/ClassNotation/VisibilityRequiredFixer.php:36 Stack trace: #0 {main} thrown in /home/www/cookbook/vendor/friendsofphp/php-cs-fixer/src/Fixer/ClassNotation/VisibilityRequiredFixer.php on line 36