Textures missing

I have created tree models using Speed Tree and exported them into .fbx format. However, when I upload these models to Cesium Ion, I see that the textures are missing and its all pink instead. How do I solve this issue?

There seem to be quite a few export options in SpeedTree, and many possible reasons for the issue. Are there any obvious error messages in the Developer Console (at the bottom of the browser window, after hitting F12 in Chrome or Firefox)?

Otherwise, if possible it might be helpful if you could provide a single, simple FBX file (maybe with just a single tree, attached as a ZIP here) where it’s possible to reproduce the issue, in order to figure out what might be going wrong here.