Clicking buttons has no effect. (Javascript error)

There's a javascript error that is causing the delete button and every other button to not work when there are many big sized torrents in a profile. I've tried loading the site in Chrome, Firefox and even with IE(Which I never wanted to use).

None of the buttons works, clicking them has no effect.

I know it's a javascript error because when in my downloads page, if I goto Tools -> Javascript Console in Chrome, there's an error that says something like "Uncaught ReferenceError: $ is not defined". Please fix this bug, I'm a pro user and at the moment I can't delete or download any files.