Fatal error: Uncaught Error: Class 'PHPMailer' not found in /home/a/a64212f0/xn--3302-94dx3a.xn--p1ai/public_html/question/phpmailer/test9H12XW/test_callback.php:40 Stack trace: #0 {main} thrown in /home/a/a64212f0/xn--3302-94dx3a.xn--p1ai/public_html/question/phpmailer/test9H12XW/test_callback.php on line 40