I get javascript error upon clicking on "Edit Entry". This problem is similar (or exactly same) as the other post "http://www.joomlathat.com/support/expense-manager/general/edit-item-bring-up-empty-box" but there is no resolution posted.

Please see the attached screenshots and following is the javascript error.

TypeError: Argument 1 of Node.contains does not implement interface Node.
http:///media/system/js/modal.js
Line 15