Instead of using the Serviio console app, try connecting to the web version. On the computer running Serviio, it's
http://localhost:23423/console. I did just try the Serviio console on my Windows 10 test server, and it worked fine. My main Serviio PC is Windows 11 and I've never bothered using the app itself, so can't say for certain if it works on that one. There's no difference using the app or the web version, so I've always just used the web page. Plus, that way I can access the console from any computer on the network, not just the Serviio computer itself.
Now if the web version doesn't work, then we have more to look into.