I upgraded my work PC from Ubuntu 18.04 to 20.04. I always work behind a proxy. I added proxy configuration in:
- /etc/environment
- /etc/profile.d/env.sh
- /etc/apt/apt.conf (for APT)
Before the upgrade, I installed some packages using Snap. After the upgrade, there seem to be a problem with my proxy configuration and Snap application: snap store can't connect to get updates from https://odrs.gnome.org/1.0/reviews/api, Skype starts but fails to connect, Postman hangs on forever on request until, in teh proxy section o settings, I add a custom proxy configuration ("use system proxy" was already selected).
I've already tried this, but with no luck.
EDIT: I tried also this, now Ubuntu Software starts but it doesn't work well: the main page is empty, and "search" is stuck...