The PVE at https://tokoeka.netzwissen.de is a single node, so, I have no /etc/pve/domains.cfg
journalctl -fu pveproxy.service shows nothing interesting, but
root@tokoeka /etc/pve # journalctl -fu pvedaemon.service
-- Journal begins at Sat 2021-06-12 04:23:15 CEST. --
Nov 25 23:36:07...