Right before I updated to 1.16.10 yesterday (21 July), all of my world's disappeared which I saved to the application. After I noticed this I updated it to version 1.16.10. My world's were still gone, and when I try to create a new world it says "trouble connecting to server" and it deletes itself, so I can't play. I've tried uninstalling and reinstalling twice, and I still have the same issue.

And a problem I had before is every time I start up Minecraft I have to re sign in to my Xbox account. I've had this problem about since I've gotten it, last week or the week before it.