I would try to play multiplayer games with someone else (both of us have a Nintendo Switch) and it would show up on my switch but when I click on it, it doesn't load. I can open a world and she can come into my world but i can't come onto hers.

It shows up "Cannot connect to world." I have tried moving closer to the router, but it doesn't help either.

Sometimes when we are playing together, it crashes and either kicks one of us out or the switch freezes.