Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/deborapsol/laravel/vendor/mautic/api-library/tests/Api/MauticApiTestCase.php:19 Stack trace: #0 {main} thrown in /home/deborapsol/laravel/vendor/mautic/api-library/tests/Api/MauticApiTestCase.php on line 19