I have no idea.please
I know that is a very old question, but just in case someone is having a similar error:
the problem is not “cl-filter.exe”, that should (as far as i know) just be an executable to trigger the compilation, but the fact that you tried to bind a UObject to a delegate using BindRaw or AddRaw instead of BindUObject or AddUObject.
Just substitute the binding with the relative “Uobject” version, and your code should compile :).