After the last update, I get this error message (twice) when accessing the webui. Tried a flash and restart. Any other ideas? Can’t access anything on the webui.
At a guess, your browser is still showing you a cached version of the UI. What happens if you force refresh the page (ctrl-F5)?
Either that, or a sudo apt update/upgrade helped. Lot of updating required apparently, thought I had done that recently but apparently not. Anyway, it’s fixed, thanks for looking.