unable to load materials from: model_normalized.mtl

[kxk20001995]

Hello, your project is fantastic. It was very helpful to me, but, when I run "python demo.py", the following issues occurred during the operation process:

unable to load materials from: model_normalized.mtl specified material (material_52_24) not loaded! specified material (material_37_24) not loaded! specified material (material_27_24) not loaded! specified material (material_47_24) not loaded! specified material (material_26_24) not loaded! specified material (material_24_24) not loaded! specified material (material_15_24) not loaded! specified material (material_6_24) not loaded! specified material (material_1_24) not loaded!