Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/trairtil/public_html/vendor/guzzlehttp/guzzle/tests/Handler/ProxyTest.php:14 Stack trace: #0 {main} thrown in /home/trairtil/public_html/vendor/guzzlehttp/guzzle/tests/Handler/ProxyTest.php on line 14