What is the problem?
Not sure how to setup a password to protect the webui
What did you already try to solve it?
Looked in settings, googled..
serial.log or output on terminal tab, browser error console ...)
Additional information about your setup (OctoPrint version, OctoPi version, printer, firmware, browser, operating system, ...)
Running Ocotprint on a Raspi 3B+ which works great. However I am never prompted for a username or password but I recall setting one up during install...
I do have TouchUI plugin and used the "blaze" or whatever script that was to come up to that automatically. Is that the issue?