It was a bug with "callvote 7" being started in the /packages directory by default, but so does menudirlist so it tries to load /packages/packages/maps/map.cgz. It's been fixed in AssaultCube 1.1.0.1. GET IT NOW!
For a quick fix just vote it with the mode commands such as /dm or /coop.
For a quick fix just vote it with the mode commands such as /dm or /coop.