This was working find up until yesterday. I've made a server for my two girls, but none of us can use it anymore.

The server works just fine with if I set "online-mode=false", but I'd prefer it if the whitelist was working. And online mode needs to be on for that (which, of course, makes sense).

This is the message that is displayed in the game: "You need to authenticate to Microsoft services".
Other public servers are working just fine. Selecting "white-list=false" does not change anything.