Fatal error: Uncaught Error: Class "GrumPHP\Test\Task\AbstractTaskTestCase" not found in /var/www/public/git/vendor/phpro/grumphp/src/Test/Task/AbstractExternalTaskTestCase.php:18 Stack trace: #0 {main} thrown in /var/www/public/git/vendor/phpro/grumphp/src/Test/Task/AbstractExternalTaskTestCase.php on line 18