Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/nascflem/public_html/vendor/league/oauth1-client/tests/RsaClientCredentialsTest.php:10 Stack trace: #0 {main} thrown in /home/nascflem/public_html/vendor/league/oauth1-client/tests/RsaClientCredentialsTest.php on line 10