Fatal error: Uncaught Error: Class 'Tx\Mailer\Exceptions\SMTPException' not found in C:\xampp\htdocs\hou\vendor\txthinking\mailer\src\Mailer\Exceptions\SendException.php:28 Stack trace: #0 {main} thrown in C:\xampp\htdocs\hou\vendor\txthinking\mailer\src\Mailer\Exceptions\SendException.php on line 28