Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in C:\gen\ms_core\DiscordApi\vendor\team-reflex\discord-php\tests\FunctionsTest.php:18 Stack trace: #0 {main} thrown in C:\gen\ms_core\DiscordApi\vendor\team-reflex\discord-php\tests\FunctionsTest.php on line 18