Some time ago, I stumbled into the same problem (Running XNALara_XPS 11.8 on Windows 8.1 with Nvidia GTX GPU). I analyzed the model and found the mistake. Like you written, the path listed in the pop-up also doesn't match mine. Some porters has coded the path to the textures, inside the mesh file, ...

I second this

Previous post got deleted 'cause I found the solution: When trying to port MMD models to XPS, Blender versions 2.80+ require a different method of assigning the textures to the model. Doing this porting stuff with version 2.79 at the latest takes the textures over when porting the model. Sometimes ...

Hello, I have a .obj model with three JPG textures - a (base color, diffuse, and roughness). That's it, nothing else. When I load the .obj into XNA (under Modify- Load Generic Item/Load Static .obj) the textures are not applied so the model is that base greyish/white. There are no error messages or...