Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\laragon\www\clientxcms\vendor\sumup\sumup-ecom-php-sdk\tests\ApplicationConfigurationTest.php:10 Stack trace: #0 {main} thrown in C:\laragon\www\clientxcms\vendor\sumup\sumup-ecom-php-sdk\tests\ApplicationConfigurationTest.php on line 10