Fatal error: Uncaught Error: Class 'PhpCsFixer\AbstractFixer' not found in /var/www/app/appregwebservice/vendor/friendsofphp/php-cs-fixer/src/Fixer/StringNotation/ExplicitStringVariableFixer.php:28 Stack trace: #0 {main} thrown in /var/www/app/appregwebservice/vendor/friendsofphp/php-cs-fixer/src/Fixer/StringNotation/ExplicitStringVariableFixer.php on line 28