Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in D:\programs\xampp\htdocs\antares-backend-stage\vendor\webklex\php-imap\tests\live\LiveMailboxTestCase.php:39 Stack trace: #0 {main} thrown in D:\programs\xampp\htdocs\antares-backend-stage\vendor\webklex\php-imap\tests\live\LiveMailboxTestCase.php on line 39