We’ve received alerts about intermittent failures when downloading (installing or refreshing) snaps. We are looking into the situation and will update once we know more.
The failure is manifested as “503” errors when trying to download snaps. Retrying is safe and might result in a working download after a few attempts.
Current status and updates can be seen at: https://status.snapcraft.io/
Apologies for the inconvenience,
Snap Store team
UPDATE: 2020-01-28 18:03 UTC - The issue has been resolved.