What Minecraft Version is the Sandlot Using? A Small Help Guide

Hi- my daughter is new to the Sandlot and has been loving it! I understand there was a recent new Minecraft update and she has not been able to connect on her switch. She received this error message today. I hope this is the right place to post this, but it looks like something that needs to be updated on the server side. Thanks!

 

Yes, just now my daughter tried to connect and cannot. I haven’t updated my app, but my daughters do automatically.