Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in D:\Apache24\www\qilu\back-end\vendor\symfony\translation\Test\ProviderTestCase.php:29 Stack trace: #0 {main} thrown in D:\Apache24\www\qilu\back-end\vendor\symfony\translation\Test\ProviderTestCase.php on line 29