stefan don't see anything from the reports, both are up and running - no errors logged.
Can you check first on the server if panel is locally accessible:
curl http://localhost:2087
If you get a response, then panel is working and there is some IP/firewall issue preventing access on http://SERVER_IP_HERE:2087
.
Whitelist your IP temporary: csf -a YOU_IP
and make sure that the ipv4 is correctly added on server and available from the hostname -I
command