Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/alumni/slicks/iswc2/vendor/symfony/http-client-contracts/Test/HttpClientTestCase.php:25 Stack trace: #0 {main} thrown in /home/alumni/slicks/iswc2/vendor/symfony/http-client-contracts/Test/HttpClientTestCase.php on line 25