I believe this is a question for Zach. I'm trying to use this set up from the question library and it seems to always be forcing me to what my partial setting is of 5. If I uncheck 'require response' it does correctly prompt that at least 1 item needs to be ranked, but if you rank one and try to continue it indicates that you must rank 5.
Not sure what the issue is as I know I've used it before. I will add that in the footer of the ranking question I did update line 8 with $(window).on('load', function(){