Just found out i’m facing the same issue. I restart constantly but it always comes back. Now it didn’t, so though i’d check the logs on the console. I have this error message as mentioned above.
So, I don’t know for how long i’ve been experiencing this, I hardly ever look at the CLI. After rebooting the entire host it came back. The error remains, but at least HA is working again.
First the OS, then the Core. Just because that was the order they arrived at my installation. The OS was upgraded several hours before the Core.
(I had already upgraded Core to 2024.2.3 after this problem occurred, so the upgrade process itself was not broken for me. But only with 2024.2.4 did the Cli problem get fixed.)
I can confirm updating to the latest version of both the OS and Core solved the problem. Thanks so much to everyone that responded and a massive thanks to all the developers!!