This bug was fixed in the package update-manager - 1:18.04.11.3
--------------- update-manager (1:18.04.11.3) bionic; urgency=medium
* Add support for HTTPS proxies; this breaks UpdateManager.Core.utils.init_proxy() API - the return value is now a dict, rather than a string (LP: #1771914).
-- Julian Andres Klode <email address hidden> Fri, 29 Jun 2018 14:44:16 +0200
This bug was fixed in the package update-manager - 1:18.04.11.3
---------------
update-manager (1:18.04.11.3) bionic; urgency=medium
* Add support for HTTPS proxies; this breaks UpdateManager. Core.utils. init_proxy( )
API - the return value is now a dict, rather than a string (LP: #1771914).
-- Julian Andres Klode <email address hidden> Fri, 29 Jun 2018 14:44:16 +0200