Can not upload and save definition

WIth the latest version, the model says it has succesfully uploaded, but the save button is greyed out, if I swith to the older platform I receive the following errors

Model uuid: 96d4c96b-5399-480a-b5e9-f9752d89e8fd

Model guid: db880f9f-2eb0-4da8-b828-05d3baa34d98

Please advise

There is a known small bug for models that have a long title, what you need is to shorten the model slug in the edit settings and the Save button will become available:

Perfect, problem solved