https://vixdeo.com/errors/material-not-usable
The material named in the request cannot be used for it: it does not exist in this account, its original file is no longer stored, or it is not of the kind the request needs (for example an audio file where an image or a video is required). `extensions.reason` says which; when the material is named by the shots of a scene, `extensions.shots` lists each shot that was refused (the scene, the shot, the asset and its reason). Nothing was created, staged or committed, and nothing was charged.