jergrau on "[Plugin: All-in-One Event Calendar] Categories will not scroll down"

I have a big list of categories and as I try and scroll down they are locked and will not go down my whole list. I have tried on several Browsers and it acts the same. Did I do something wrong I have a total of 195 categories.

http://www.actionwithpurpose.com/

https://wordpress.org/plugins/all-in-one-event-calendar/