Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in C:\gen\ms_core\DiscordApi\vendor\ratchet\pawl\tests\unit\ConnectorTest.php:9 Stack trace: #0 {main} thrown in C:\gen\ms_core\DiscordApi\vendor\ratchet\pawl\tests\unit\ConnectorTest.php on line 9