Pipeline mode is set to classic

GoDiagram (6 and previous)
1

When the application pool’s pipeline mode is set to classic. The page gives an error.
When it’s integrated. It’s good.

You know what may be the root caause may be the root cause?
We are using go-diagram 4.2.0.4

2

The error message is:
COLOR=red]"loading image… check Web.config

3

Check the Web Intro. Web.config has to be different for classic mode.