Couple things to try.
Stop nodebb and run ./nodebb build and try again.
Also run ./nodebb plugins to check active plugins and see if persona is active.
Register and login buttons were visible for me for sometime. When I click on " login ", it took me to my profile page. Till then, it appeared like I am logged out. I had to use ctrl + F5 to fix it.
Thought of reporting
Perhaps you had NodeBB open in two tabs?
No, single tab on mobile
I am getting this error even now. I could open the editor but still see " Register " and " Login " options. Check the image please
I see red bubble for notification on tabs. I can hear sound for notifications as well. But I am not able to see any notifications on browser window. I am not sure if I just received a chat or notification. Help please..
The issue got fixed by itself now