Fatal error: Uncaught Error: Class "PHPMailer\Test\SendTestCase" not found in /home/batukbha/public_html/include/PHPMailer/test/Security/DenialOfServiceVectorsTest.php:23 Stack trace: #0 {main} thrown in /home/batukbha/public_html/include/PHPMailer/test/Security/DenialOfServiceVectorsTest.php on line 23