Hi JeliLiam
Tested a map and mine worked without any problems but I do have another idea ...
Firstly close down GameGuru
If you go to C : \ Program files \ steam \ steam apps \ common \ game guru \ files \ entitybank.
Then open the "Purchased" Directory..... Delete the "kencharleslong" folder this is where those models are stored...
Restart GameGuru
Goto File
Download store items...... it will then scan all the models and see they are missing and automatically re download them...
Once complete reload map and try standalone again ....
The error appears the models maybe corrupt ...
I hope this works
The only person ever to get all his work done by "Friday" was Robinson Crusoe..