Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/busines5/public_html/mailer.businessbrandagency.com/vendor/apimatic/unirest-php/tests/RequestTest.php:14 Stack trace: #0 {main} thrown in /home/busines5/public_html/mailer.businessbrandagency.com/vendor/apimatic/unirest-php/tests/RequestTest.php on line 14