I am following this procedure to publish a scene layer from a file geodatabase with only multipatch featureclass.
I seem to recall that I already performed such operation in the past, when this option was still in beta, and I succeeded.
However, now it seems not to work anymore. This is what I am doing: I created a file geodatabase with only multipach inside, all in Web Mercator reference system (EPSG: 3857, or 102100). I zipped it and uploaded it to my AGOL (logged in as administrator), choosing to publishing it as a Feature Service. I can open and see it in a Map viewer. Now, inside the details of this same Feature Service, I click on the Publish button and then on "Scene Layer", but nothing happens.
How can I solve this problem? Is there anything I did not consider in my workflow?