@LEB-ID Yes, in XO > Settings > Servers should only have a single entry.

Once connected

XO > Home > Hosts should display your 2 servers

xe vm-list

will return also your snapshots. There are several options to the command.

try grep'ing:

xe vm-list is-a-snapshot=false

This will not most definitely only show Hades.

Ubuntu LTS

Are you sure you are pinging the right machine? No change you have a duplicate IP address?

Can you try? Just to make sure it's not a browser problem.

Did you try in XCP-ng Center?
This would help narrow down the problem.

@LEB-ID It's called Add new Server in XCP-ng Center too... old habits die hard. But Pools is not the right word either. It's hard coming up with something short and precise.

@LEB-ID Yes, in XO > Settings > Servers should only have a single entry.

Once connected

XO > Home > Hosts should display your 2 servers

How many Pools do you have? How many Hosts?

If you have 1 XCP-ng Pool, you only need 1 entry in your XO Servers page, the master only.

Just disable your current and add the other one with the ip instead of the hostname or vice-versa. Just to be sure your API is responding correctly.

did you try removing & adding the server?

What is the red explanation mark saying?