This post will be a catalogue of errors I’ve had interacting with the MYOB Exo API, and how to resolve them. Code: Unable to load ModuleSecurity for ‘appid=4400’Appears: Error appears when doing any requests apart from discovery.Meaning: The module ‘4400’ is unlicensed. 4400 is the API.Resolution: Make sure the API License is loaded in Exo … Continue reading MYOB Exo API – Some errors explained.