This bug was fixed in the package update-notifier - 3.168.8
--------------- update-notifier (3.168.8) xenial; urgency=medium
* Fix APT sandboxing for data downloads failing (LP: #1522675)
-- Julian Andres Klode <email address hidden> Fri, 02 Mar 2018 12:27:35 +0100
This bug was fixed in the package update-notifier - 3.168.8
---------------
update-notifier (3.168.8) xenial; urgency=medium
* Fix APT sandboxing for data downloads failing (LP: #1522675)
-- Julian Andres Klode <email address hidden> Fri, 02 Mar 2018 12:27:35 +0100