Given the API response shown, what is the most likely problem?

The API response "405 Method Not Allowed" directly indicates that the HTTP method used in the request (e.g., GET, POST, PUT, DELETE) is not permitted for the specified resource. This means the server understood the request but refused to fulfill it because the method is not supported for that endpoint. If authentication credentials were incorrect, the error would typically be "401 Unauthorized" or "403 Forbidden." An incorrect URI string would likely result in a "404 Not Found" error. An incorrect API port would prevent the connection entirely, leading to a connection error rather than an HTTP status code from the server.