I followed all of the steps in the sendgrid videos etc. I this error

Question

Fatal error: Composer detected issues in your platform: Your Composer dependencies require a PHP version ">= 8.2.0". You are running 8.1.27. in /home/turnproa/public_html/AMS/vendor/composer/platform_check.php on line 24

I tried

<?php

require ('vendor/autoload.php');

$mail = new PHPMailer();
$mail->isSMTP();
$mail->Host = 'sandbox.smtp.mailtrap.io';
$mail->SMTPAuth = true;
$mail->Port = 2525;
$mail->Username = '1a2c62349d628e';
$mail->Password = '231be3e4c0b3e3';

$mail->SMTPAuth = true;                               // Enable SMTP authentication
$mail->SMTPSecure = 'tls';                            // Enable TLS encryption, `ssl` also accepted
$mail->Port = 587;                                    // TCP port to connect to

$mail->setFrom('[email protected]', 'Jason Webber');
$mail->addAddress('[email protected]', 'webDawg');

$mail->Body= 'this is my email body';
        $mail->AddReplyTo('[email protected]', 'Aqua jason');
        $mail->Subject = 'PHPMailer Test Subject via mail(), advanced';
        $mail->AltBody = 'To view the message, please use an HTML compatible email viewer!'; // optional - MsgHTML will create an alternate automatically
   //     $mail->MsgHTML(file_get_contents('contents.html'));
        //$mail->AddAttachment('images/phpmailer.gif');      // attachment
        //$mail->AddAttachment('images/phpmailer_mini.gif'); // attachment
        $mail->Send();
        echo "Message Sent OK\n the body is sent";

?>

and I was expecting an email in my inbox

Process. install composer components following steps on sendgrid upload my vendor folder from computer to hostGator server write my file (in dreamwearver) and upload to host gator refresh website and get error