Fatal error: Uncaught Error: Class 'Route' not found in vendor\topthink\think-captcha\src\helper.php on line 12

//test.php in test folder
require_once __DIR__.'/../vendor/autoload.php';

use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\Exception;

$mail = new PHPMailer(true);  
try {} catch (Exception $e) {}