Don't work search in Kleopatra
Smb know why?
You probably entered incorrect string, use Tor (sometimes it doesn't work when using Tor in my case) or something wrong happen wit the server (AFAIK they search on
https://pgp.mit.edu where i got error 502/503)
i have encountered the same problem without Tor where the pgp.mit.edu server itself is offline and unreachable which is why you also get an error in PGP applications trying to fetch the public key. changing the key server fixes that problem.
gpg --keyserver pool.sks-keyservers.net --recv-keys 7F9470E6
https://superuser.com/a/1250706or for Kleopatra i think this article can help:
https://www.gpg4win.org/doc/en/gpg4win-compendium_22.html