There was a problem with the database connection¶

Lino tells me that “There was a problem with the database connection. If the error persists, try reloading your browser.”

What does that mean?

Just hit Shift+Ctrl+R and try again. Lino might ask you to re-enter your username and password. This is usual e.g. after maintenance operations on the server.

See xkcd for more options.
Check the address field of your browser. This should show the URL where your Lino is installed, i.e. something like http://lino:8080 or https://lino.example.com. If it isn’t, click the Home menu button of the Lino main menu.