keyring error

# rm -R /etc/pacman.d/gnupg/
# rm -R /root/.gnupg/  # only if the directory exists
# gpg --refresh-keys
# pacman-key --init && pacman-key --populate
# pacman-key --refresh-keys

subl3 /etc/pacman.d/gnupg/gpg.conf

keyserver hkp://pool.sks-keyservers.net:80

References

https://arcolinux.com/fix-for-key-could-not-be-looked-up-remotely/