Substance Painter Failed To Load 3D Scene

10.0.1
Windows 11
Expected when importing FBX for UDIMS to function properly.
FBX did not even import because it failed

I've created a project utilzing UDIMS. Previously, I had been getting errors importing because of unsimple polygons, which I have now fixed. With that, now when importing it gives me a vauge "Failed to load 3D scene" error. Only detail being a mention about fixing not normalized mesh normals, which it claims it will fix automatically. Please help.