CMK: Not able to use TLS on numerous Ubuntu Hosts, breaks monitoring

I’m now beginning to see the following error persist for Systemd Service Summary of multiple hosts after disabling TLS registration,

Perhaps this is the root issue?
where does the CMK agent store it’s logs?

Systemd Service Summary: Total: 154, Disabled: 2, Failed: 1, 1 service failed (cmk-agent-ctl-daemon)CRIT

Edit: after some digging, I found this post
https://forum.checkmk.com/t/trouble-after-upgrading-to-2-1-agent/31675/15

I’ve run the following commands which seem to fix the issue? Not sure if there are any implications to doing this though…

sudo systemctl stop check_mk.socket
sudo systemctl disable check_mk.socket

I tried to stop the socket, remove check-mk-agent then install 2.1.x but that didn’t do it… had to outright disable it.

could someone confirm if the check_mk.socket is residual from 2.X and is there a cleaner method for removing it then just disabling the service?