{"code":"MethodNotAllowedError","message":"POST is not allowed"}

Hi guys,

When I test the form and click "login",  I get this:

{"code":"MethodNotAllowedError","message":"POST is not allowed"}

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// index.php

<?php
$name = $_POST["name"];
$password = $_POST["password"];

$result = loginUser($name, $password);

echo $result;
?>

// .html
<form action="index.php" method="POST">
<input type="text" name="name" >
<input type="text" name="password" >
<input type="submit" value="Login" />
<form>

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Dreamweaver geniuses, can you help me please~