Ultimate Members Groups missing Join Group button

I’m using UM Pro & UM Groups, and from documentation, public groups should have a Join Group action button on the Groups directory page. I see the Leave action button, but nothing for Join on regular member test account for public groups. The only way I can add user into a group is to be in admin and send out invite. I’ve disabled all other plugins except the two UM & UM Groups, but that didn’t fix anything either. Any idea what could be the problem?
screencap: https://prnt.sc/kGazrtG8TUNt

• This topic was modified 1 year, 5 months ago by zymotix3.