Hi,
sorry for the problems. The problem is that a path was selected by Cheetah3D where it can't find the skript. Did you possibly rename the some files or folders.
There shouldn't be the "f" like on the image below. Does other scripts work? And does all scripts appear in the "Run Script" sub menu? Did it work in Cheetah3D 2.3 or older?
By,
Martin