Model-tiler v4.5.2 texture issues

I am using the model-tiler to produce data sets of OBJ models created in Max.

When i run the compiler I am getting these errors issues. Can you explain what is going wrong please and offer an answer/work around?

  • Could not get decoded texture data for T_Roof_orm.tga. The material will be created without a metallicRoughness texture.

  • Could not get decoded texture data for T_Fence_albedo.tga or T_Fence_opacity_mask.tga. The material will be created without an alpha texture.