Apparantly, one needs an Ubuntu SSO account for installing Snaps in 16.04 through ubuntu software (see this link). That's fine with me, but it keeps telling me that my username or password is wrong although I've just changed my password (in fact, twice just to be sure).
So, what could I do to prevent Ubuntu software to tell me my password is wrong, please?
Best Answer
This is a bug caused by the newest version of snapd.
You can work around the problem by opening a terminal and logging in with
sudo snap logininstead.