This has happened to me. Make sure your game is fully updated. Restart your PC if needed. If this doesn't work, try to reinstall Minecraft
you cant connect worlds from your phone to your xbox. Same thing with Xbox to PC, PC to Xbox, Phone to PC, Phone to PS4, etc.
This has happened to me. Make sure your game is fully updated. Restart your PC if needed. If this doesn't work, try to reinstall Minecraft