Failed to distill Omniverse://Ipaddress/.../CesiumMaterial157.mdl

I am attempting to integrate Cesium Ion and Unreal Engine 4.27.2, and convert it to USD format by exporting from UE to Omniverse Nucleus. However, when I open the USD file, Cesium tiles’ color and texture does not render.
I would like to export the file with texture and color rendered in USD format. Does anyone have any solutions to this? Thank you in advance for your help.
[After & before converting to USD format, respectively]

[Error message]
Failed to distill omniverse://ipadd./Project/C/Materials/CesiumMaterial157.mdl

We haven’t yet come across Cesium Ion’s Unreal materials yet. I see that the plugin is available from the Marketplace so we’ll test it and see if we can correct your issue.