How can I solve this Fortnite connectivity problem on the Switch?

Hey guys,

I've been playing Fortnite on the Nintendo Switch Lite for several months and have never had any problems. But now when I started the game, I wanted to start playing, but this window appears all the time when searching for players.

Does anyone happen to know what this means and how can I fix this error?

Maybe restart Nintendo and if it doesn't work just delete Fortnite and download it again