Hi Aust
Thank you for your Post. I understand your frustration, and this is not an experience we want to provide to our customers. We strive hard to provide a seamless experience to our clients. I regret the inconvenience caused you.
We apologize for the delayed response and any impact caused. This change was an unintended impact of some planned development work we had. We have restored access for those developer partners impacted. If you're still seeing further issue, please use this link Contact MYOB Developer Team to log a ticket.
Feel free to post again if you need further assistance. feel free to post again, we are happy to assist you further.
Thanks,
Cel