On a fresh Arch Linux install, I have difficulties to make flatpak work. It seems it's due to a GPG issue but I can't figure out what I did wrong. I cleared the caches, uninstalled & reinstalled, to no avail.
Here is an expression of the symptom:
$ flatpak remote-ls flathub
error: Unable to load summary from remote flathub: Signature made Mon Jan 24 18:48:35 2022 using RSA key ID 562702E9E3ED7EE8
Can't check signature: public key not found
Please note that the user profile has been restored from a backup (incl. its GPG keys). I checked GPG seems functional. Any clue? Thanks!