This very bug is caused by an incorrect locale. That is, the locales has been setup in /etc/default/locale, but the system has mangled it in a weird way. See https://bugs.launchpad.net/ubuntu/+source/apt/+bug/1410676 for reference.
This very bug is caused by an incorrect locale. locale, but the system has mangled it in a weird way. /bugs.launchpad .net/ubuntu/ +source/ apt/+bug/ 1410676 for reference.
That is, the locales has been setup in /etc/default/
See https:/