Fixed.
The previous fix was wrong. I made a worst mistake.
The correct path for loading fof is
libraries/fof30/include.php
I fixed also the ControlPanel controller (the name in CamelCase)
I fixed the images paths in the sandbox.
Right now FOF is working quite good. It is not able to handle all the Cook features because we add a lot of functionalities.
Grid groups, ajax...etc.
At the moment it is experimental for discovering the power of FOF.
FOF is a great library and we will put a lot of effort in it in future.