Fatal error: Uncaught Error: Class "PhpCsFixer\RuleSet\AbstractMigrationSetDescription" not found in I:\www\pvcRegex\vendor\friendsofphp\php-cs-fixer\src\RuleSet\Sets\PHPUnit54MigrationRiskySet.php:23 Stack trace: #0 {main} thrown in I:\www\pvcRegex\vendor\friendsofphp\php-cs-fixer\src\RuleSet\Sets\PHPUnit54MigrationRiskySet.php on line 23