This one seems pretty strange. I'd expect an either/or whether ACP worked at all, not a fail of a single tab/sub menu. Maybe something got corrupted/horked at the initial setup stage. Some gremlin glitch in la' machine? Since this is all brand spanking new and you've nothing to loose but some time, I suggest you try blowing the db away and run set up. Also, ensure you are doing so as your nodebb user, not root.
Some other thoughts:
Are you using Mongodb or Redis?
Have you double/triple checked your config.json parameters? Typos?
What version of Nodejs are you running?
Are you hitting the nodebb app server directly or proxying thru e.g. Nginx?
Any one of which could potentially cause a glitch so maybe double check all that 'chit? I'd rule out #1 though if you blow db away and problem persists. Hence, maybe some low hanging fruit you can rule out there, eh? Then focus on else?
May the force be with you.