The reason why this might fix itself is a dom0 update.
vmupdate: update expired whonix/kicksecure key by marmarek · Pull Request #206 · QubesOS/qubes-core-admin-linux · GitHub
gpg: WARNING: no command supplied. Trying to guess what you mean …
→ Qubes Updater Warning - Whonix 17 - gpg: WARNING: no command supplied. Trying to guess what you mean