Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in D:\NTG_App\www\Support_Issue\vendor\symfony\service-contracts\Test\ServiceLocatorTest.php:18 Stack trace: #0 {main} thrown in D:\NTG_App\www\Support_Issue\vendor\symfony\service-contracts\Test\ServiceLocatorTest.php on line 18