ACP -> Extend -> Widgets:
Apply widget to "Categories" tab only, not "Global" or any of the others.
Screenshot_2020-07-02 Extend Widgets NodeBB Admin Control Panel.png
I am in beijing, and I can't access nodebb website or community without shadowsocks, I think maybe the China GFW block it. If nodebb need more people to use it. This problem should be solved, maybe build a mirror website?