Method not supported. This typically happens when the URL you're calling responds to a PUT request, but not PATCH.
{
"type": "/sso-config/error-responses/method-not-allowed",
"title": "Method not allowed",
"instance": "3403724b-88b1-4759-ae7e-3a68e2cb0c71",
"detail": "The system does not support the method you provided for this resource.",
"errors": []
}