When you upload mesh and texture assets to a group, you can set them up as accessories and upload them to the catalog.
However, if the meshes you upload are meant for body parts (body or head uploads), you will get an error.
This does not affect normal accessories
Changing the creator of the asset does not fix the issue.
Expected behavior
I would be able to upload a bundle as a group asset and put it on the catalog.
Thanks for the report. Did you upload all of the assets referenced by these body parts yourself, or did other creators in your group upload them?
At the moment, I believe you can upload as a group as long as you (as an individual) uploaded all the assets it depends on. Ideally publishing as a group would work as long as the assets are owned by anyone in the group, but we found some problems with our group ownership logic and are working on it.
I tried both myself and someone else uploading the assets, with both not working.