Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in C:\Apache24\htdocs\vendor.old2\symfony\debug\Tests\Exception\FlattenExceptionTest.php:32 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\vendor.old2\symfony\debug\Tests\Exception\FlattenExceptionTest.php on line 32