I have a handfull of snap apps. They include Discord, Slack, Spotify, Messenger, Mailspring, VLC, and others. Slack is a classic (unsandboxed) app. The rest are normal snaps.
None of the sandboxed apps are able to establish a network connection.
snap disconnectfollowed by
- a system restart.
- a reinstall of some of the snaps
They all broke simultaneously a few days ago. I'm on 20.04. I really don't know how to go about debugging this.
Edit: To clarify, I am confident that this issue is due to snap sandboxing because whatever caused it to break affects all sandboxed snaps, and they all broke at the same time. It happened a few days ago, but it took me a few days to notice and make the connection that being snaps was the only thing all these apps have in common. I didn't make any system changes. At worst, I may have installed some updates.