405 HTTP Error on submitting data on PHP / HTML form

I am building a form that the filled data need to be sent to an email. I am using HTML and PHP. But Unfortunately I get the following error when I press SUBMIT button.

405 - HTTP verb used to access this page is not allowed. The page you are looking for cannot be displayed because an invalid method (HTTP verb) was used to attempt access

The PHP code is :

<?php

if (isset($_POST['submit'])) {
    $name = $_POST['name'];
    $visitor_email = $_POST['email'];
    $message = $_POST['message'];
    
    $email_subject = "NEW MESSAGE VIA CONTACT FORM";
    
    $email_body = "You have received a new message from the user ".$name. ".\n".$message;
    
    $to = "[email protected]"
    $headers = "From: ".$visitor_email;
    
    mail($to, $email_subject, $email_body, $headers);
    header("Location: index.html?mailsend");
}
?>

The HTML form is :

<form method="POST" class="contact-form" actions="contactform.php">
                                <input type="text" name="name" placeholder="Full Name">
                                <input type="text" name="mobile" placeholder="Your Mobile Phone">
                                <input type="text" name="email" placeholder="Your E-mail">
                                <textarea class="materialize-textarea" name="message" placeholder="Your Message"></textarea>
                                <input type="submit" value="Submit" class="btn">
                            </form>

UPDATE: with this edit on code: action="contactform.php" , I dont get the error but the email is not send

FINAL SOLUTION: Changed the php file to this:

    $headers = "From: ";
    $headers .= $visitor_email;
    
    mail($to, $email_subject, $email_body, $headers);
    header('Location: ../');

I found the problem via the log files in the webserver


Solution 1:

maybe you wrote actions instead of action in the form's attribute

actions="contactform.php"

should be

action="contactform.php"