Getting a HTTP 405 Error – Why Is My Request Method Not Allowed? or HTTP 405 Method Not Allowed – How

Ugh, http 405 is the worst. It’s usually a server-side thing tho.

Did you check CORS? Sometimes the preflight OPTIONS request fails and masquerades as a 405.

Also, peek at the server logs if you can—might give you a clue. If it’s a REST API, maybe the endpoint just doesn’t allow the method you’re using.