I don’t know, I tried even with uptime-kuma and Homepage but as soon as I start the service it kills it after 6 unsuccessful restarts. Maybe I will spin up a completely new VM tomorrow and start from scratch.

I think the problem might be with the data directory permissions, even though I have added the subuid and the subgid to my user and enabled the lingering on the user.

But I did so many things so there is a chance it is already quite messed up.