Diffuse and Specular Textures Not Loading

[mrphilipjoel]

Greetings.

At runtime, I'm downloading and displaying a .glb model of Human heart in game.

The .glb gets downloaded to my computer. I can open it from file explorer, and it looks fine.

However, in Unity, it looks grey.

It appears the first two textures don't get included when downloading into Unity.

See how there is no texture in albedo or metallic?

There are a total of four textures, but it appears to only be loading 2. Here you can see the shader in blender shows all four textures.

This is what the model should look like:

However, in Unity it looks like this:

Thank you for any help.