Failed to download repository info

[Aravisian]

@Ferval

Err:7 https://repo.protonvpn.com/debian stable InRelease                      
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY EDA3E22630349F1C

Another user recently had this same issue:

Issue with upgrading from Zorin Education to Zorin Pro

These. These are the unstable Debian branched repositories. https://repo.protonvpn.com/debian unstable InRelease These can be removed by elevating to root sudo -i launching the file manager nautilus Navigating: "Other Locations" > "Computer" > clicking etc open, then apt open, then sources.list.d (the directory, not the file) folder open. Then right click the ProtonVPN entries and right click to delete. Once you have upgraded Zorin OS, you can re-add the repositories for ProtonVPN i…