Hallo Monello
The issue you are having on Server 8, is exactly the same as me. You are not alone.
I get the same error message as you.
I have tried to load the same track on my Windows XP machine, and it initially crashed, so i deleted all the files in the track locations directory. Then i tried to load the same circuit again with an instant crash out, obviously hehe.
So then, i copied all the track files back into the Targa directory, and now my Windows XP will load the circuit fine. So this is a strange error.
I tried this again on my main Windows machine, and no matter what i do, i still get the error.
It works fine on my Windows XP, but does not work on my Windows 8.1.
There must be a single file or multiple files conflicting with the system. Its the only thing that can be causing the problem i think.
Maybe together we can work something out to fix the problem.
Speak soon
Plug