Okay,
I see a mootools error. It looks to me like the mootools is conflicting with another module or component actually.

It you could and want to put the time into it I would suggest creating a new dummy page. Place the Moolet on that page with nothing else, not even the header if possible and see if that works. If it does then turn on each gizmo one by one until you find the one that does not play well with others.

If that does not work then there is an issue with the template itself.

Do you by chance still have a default template in the install? If so assign that to the new page for the test also and see if that sheds some light