Hi there.
Thank you for reaching out via the forum.
I see you have a support ticket with us as well so I will liase with you there.
I will leave some general information about that error here for anyone else who encounters it.
The error DeveloperInactive generally means that the API is unable to read your API key. This is due to either the Key being inactive or the `x-myobapi-key` is missing from the request.
From our end we can check your key is active, at your end I would check that you are passing all the correct headers during in the failed request.
Kind regards
