I was just trying to use Hueman instead of Arras, which is discontinued. It looks very promising, and everything was fine until I pressed "Reset options" (or something similar) in the social links section. I got a message "Lost connection to database" (in Danish).
I have more sites running on the same server, so it's not the server.
Any recommendations? (the site is trykkoger.dk and I was using a child theme).
Of course something else might have caused the error.