SCS Software

The error say me that I must add three lines in the file machine.config and the problem is with the debug jit.
What is it ?

As soon as I will show you a picture of the screen where you get the error

Hello;
I'm a new user.
I have a problem with this fantastic tool.
This problem is only when I create a skin for a truck.
The tool say me that I must create a new font in the system folder of windows.
Why I have this problem ??