I got that log entry when I used a testdomain without valid cert…
Failed to load web certificate at: "https://mesh.test.com:443", host: "mesh.test.com"
…but as soon as I change to a valid cert I get
Loaded web certificate from "https://mesh.mrmarkuz.tld:443", host: "mesh.mrmarkuz.tld"
Maybe it helps to remove all the data and start over when the LE cert is already obtained.
Enter environment:
runagent -m meshcentral-light1
Stop services:
systemctl --user stop meshcentral-light
Remove all volumes:
podman volume rm -a
Start services:
systemctl --user start meshcentral-light