Comment 3 for bug 240600

> warning: database package not installed?

This is a clue here - you need either postgres or mysql installed either locally or remotely (I see it was pulled down with your install) AND configured. If mysql/postgres isn't properly configured with passwords and permissions you need on your server dbconfig-common will not be able to create the databases.

Once mysql is configured, run `sudo dkpg-reconfigure webcalendar`to go through the automatic database configuration again.