Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/bariatric/public_html/api/vendor/facebook/php-business-sdk/test/FacebookAdsTest/AbstractTestCase.php:36 Stack trace: #0 {main} thrown in /home/bariatric/public_html/api/vendor/facebook/php-business-sdk/test/FacebookAdsTest/AbstractTestCase.php on line 36