Prior to the 1. 16.20 update, my son was able to create a world on the nintendo switch minecraft and then invite his friends to join it. Since the update, it doesn't work. We enter minecraft and verify we are connected to our Microsoft account. When we try to open a world we've created and try to invite friends, we get an error saying 'oops! You've lost your connection to your Microsoft account.. Go back to main menu...'. When we go back to the main menu, it says we are still connected to Microsoft. No matter how many times we go through this loop, it keeps happening. My son's gamer tag is TimingAlpaca44 if that helps.