Hey this thread is old, but I figured I'd still add if anyone is looking for a quick stress-free solution to the broken temple and broken palisade. This obviously isn't ideal because the textures look strange/stretched but the temple and ruined palisade/wall materials don't work. I don't have any program or coding skills that would allow me to fix it, so this is a good alternative if you still want to use them. I would experiment with material 1 on the temple because I just settled for a stretched cobblestone texture since the correct cobblestone material isn't working.
For the temple:
Material 1 - ossyjaoldcobblestone
Material 2 - rezpastainedwall
Material 3 - rezpacollumn
For the ruins, or the 'Stone Palisade'
rezpastainedwall for the entire thing.
The mesh is broken so if you try to use different materials it switches around where the materials are in the material order, save yourself some stress and just use one material throughout for this one!
I have no experience with coding or 3D formatting, but hopefully for anyone who still wants to use these and doesn't want to go through a difficult process to fix them, these are an alright alternative.