HTTP 400 error "Invalid Operation"
A REST request returns response code 400 and the response body contains the following text string:
Invalid operation
The method used for this REST request is not supported for the specified resource. For example, the
Invalid operation response is returned if you attempt a DELETE request on the
system resource.
Use a method supported by the resource.
The ArubaOS-CX REST API Reference displays the methods supported by each resource.