We are working on more informative / less alarming messages for the future. Us simply saying “Failed to Render” isn’t as helpful as saying “GLB file failed to render”. I believe in most cases the .SKP file and thumbnail that we’ve always had, works great. Later we began rendering .GLB and .USD files for AR viewing and that conversion process can be finicky sometimes, which results in a “failed to render” message. Let me know if you find something else.
Lastly, the reason you don’t see the “failed to render” message when you’re logged out is because we only want to alert the owner of the model, no the entire world. Everyone else will probably just see that the View in AR button is missing.
Cheers!