Fatal error: Uncaught Error: Class "PHPUnit_Framework_TestCase" not found in D:\www\cmd\cmd_api\vendor\sendinblue\api-v3-sdk\test\Model\GetScheduledEmailByMessageIdTest.php:41 Stack trace: #0 {main} thrown in D:\www\cmd\cmd_api\vendor\sendinblue\api-v3-sdk\test\Model\GetScheduledEmailByMessageIdTest.php on line 41