Fatal error: Uncaught Error: Class 'PHPUnit\Runner\Filter\GroupFilterIterator' not found in /home/clienti2020/public_html/novaballet.it/vendor/phpunit/phpunit/src/Runner/Filter/ExcludeGroupFilterIterator.php:15 Stack trace: #0 {main} thrown in /home/clienti2020/public_html/novaballet.it/vendor/phpunit/phpunit/src/Runner/Filter/ExcludeGroupFilterIterator.php on line 15