Broken `qrexec-policy-daemon` after messed up `qubes-remote-desktop` installation

Ah. I see what the problem might be. Did you perhaps foget to type the .d? It was supposed to be /policy.d/ and not /policy/. And it’s not just this but also /etc/qubes/policy.d/ and not /etc/qubes-rpc/policy/.

Notice the command: