Can't scroll categories

I am unable to scroll the categories scrollbar down at all. Please help!

Disregard. Cannot scroll but if you click at the bottom of the scroll bar it works. 

Hi! Due to the nature of the game, we can not make a real scroll, so the scroll is made in the form of buttons 

Changed Status from Pending to Not a Bug

Why couldn't you make a arrow up and down image on top and bottom  to click on? a lot of people think its a broken scroll bar....

@Robert Stevens This can already be done in the plugin config

    "Use scroll in categories?": false,