Fatal error: Uncaught Error: Interface 'PhpCsFixer\Fixer\FixerInterface' not found in /home/vivliari/public_html/presta-validator/vendor/friendsofphp/php-cs-fixer/src/Fixer/DefinedFixerInterface.php:21 Stack trace: #0 {main} thrown in /home/vivliari/public_html/presta-validator/vendor/friendsofphp/php-cs-fixer/src/Fixer/DefinedFixerInterface.php on line 21