Who can help me?

[eeeeo]

I am use io mode this theme,but I have one question

 

[BattleKing]

I am use io mode this theme,but I have one question
View attachment 30454

eeeeodid the version match with your xenforo installation?
What happened if you press the arrow?

Did you have "[TH] UI.X 2.2.0 Patch Level 2" installed?

Check as well: Appearance -> Styles -> iO -> Style properties -> Node/forum list ->
Category strips
uix_categoryCollapse (1000) Collapsible categories