PBIDR ValueError: "Meshes doesn't have textures"

Hello I've been able to run the results for https://github.com/deepinsight/insightface/tree/master/reconstruction/PBIDR for the "raw_data" provided.
But for my custom image I've generated the "mesh.obj", "mesh.mtl", "mesh.png" files from the suggested https://github.com/barisgecer/OSTeC repository. But when I'm running the script now I'm getting the error: ValueError: "Meshes doesn't have textures". What am i missing?

Start in reconstruction/PBIDR and compare the provided raw_data assets with the custom mesh.obj, mesh.mtl, and mesh.png generated by OSteC. Run the same PBIDR script with both inputs and trace where the custom mesh is loaded; done means the custom files are accepted and the results run without the "Meshes doesn't have textures" ValueError.

Written by the indexing model from the issue text.