The 405 Method Not Allowed is an HTTP response status code indicating that the server is unable to handle the request method used. This is usually due to the server not supporting the requested method. For example, if you try to access a page using the GET method, but the server only supports the POST method, you will receive a 405 Method Not Allowed error.
How do you fix a 405 Method Not Allowed error?
The best way to fix a 405 Method Not Allowed error is to switch to a different request method. If the server does not support the GET method, you can try using the POST method. If the server does not support the POST method, you can try using the HEAD method.
RFC #: 7234 section 6.5.5
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