Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in D:\workspaces\liZiPingBack\vendor\symfony\http-client-contracts\Test\HttpClientTestCase.php:24 Stack trace: #0 {main} thrown in D:\workspaces\liZiPingBack\vendor\symfony\http-client-contracts\Test\HttpClientTestCase.php on line 24