Your post says enterprise, but image says 'AGOL', so I have to ask - ArcGIS Online or Enterprise?
You can get more information around why the package failed by interrogating the web traffic and then reviewing the job status. I've outlined how to do this in the post below (for ArcGIS Online, but should translate OK).
Common reasons are:
Hi @ChristopherCounsell its ArcGIS Enterprise. For me using a basemap in the same CS as the data made it work. Even though the data is in UTM WGS84, which does not require a transformation to Web Mercator, the offline packaging would fail. This applies that for offline use the basemap has to be in the same CS as the data in enterprise. Thanks for the hint!
Sincerely