I did an apt-get update/upgrade on my pi 3b OpenHABian system and now node red admin and dashboard ask for a sign in “http://OpenHABian:1880 requires a username and password. Your connection to this site is not secure.” This is after I have signed in to the node red admin page. If I cancel the login the admin site comes up just fine but the dashboard reports unauthorized.
The update seems to have made a secure connection mandatory. I realize that in this day and age that would be preferable but this in internal and not exposed to the public.
I had similar issues in windows environment, and had done some changes in settings.js file that I could not repair, so someone suggested to rename settings.js file to some other name, and launch node-red again, it created a new settings.js file with default settings, and that worked for me. If it doesn't you could delete the new file and rename the old one back to restore settings.
