Sketchfab sorta started working overnight, despite still getting an error. For posterity: I was using Blender 4.5 LTS and exported my sculpt to .fbx. Uploading that went fine, but Sketchfab’s model viewer said it couldn’t display the model and to check the FAQ. It seems like maybe it was just a processing time thing, as I was able to view the model overnight. On Chrome, I still get the error, but am I able to use the model viewer. On Firefox, no error, and I can use the viewer. So maybe if you see the same problem I did, give it a few hours and check different browsers.
