Error undefined textures

Hi there, I am trying to upload this model:
I only have the base colour map that works and saves without problem, whenever I plug in the normal map and the occlusion map it gives me this error message when I want to save changes

May I ask why is this occurring and what can I do?
Many thanks in advance :slight_smile:

Well, this is strange. I had the same problem few days ago :thinking:
Try saving the view first (its in a top left corner of the scene). It fixed the problem for me and it worked fine afterwards.