phejan,
I ran into the same problem and commenting out that wp_enqueue_script() function call does solve the problem in the admin section but of course the front end doesn’t function properly. It looks like a weird conflict with jQuery and the error is coming from jQuery itself:
Uncaught Error: Syntax error, unrecognized expression: #function (searchVal,startIndex) //similar to array.indexOf() - created to fix IE deficiencies
We are running WordPress 3.8.4
Hope this helps.
Plugin looks great, just need to fix this issue and add the abililty to sort the items using drag and drop and it will be a winner.