Ditty plugin not working

hello all,
I am currently helping my Department to prepare a webpage of my Department from scratch.
I am using the template which others Department have used.
No department has this Ditty plugin installed and so we cant learn from experience here unfortunately.
Could someone give a suggestion why is the Ditty Plugin not working ?
Some help on this regard would be much appreciated.
best regards.
Abhi

PS: I have recently used this plugin without any problem for my personal research website.

The page I need help with: [log in to see the link]