Well, the only plausible thing seems to be that Nintendo doesn`t connect to rocket League servers on its own, but relies on user requests. This means that whenever you have already launched the game, an updated license agreement is loaded on the switch, resulting in disruptions. Before playing Rocket League, you must accept a licensing agreement. This license agreement is updated occasionally, which requires players to give their consent each time. If a player does not finish his game from time to time, he will probably come across an error preventing him from playing because he has not accepted the new license. A simple solution is to finish your game properly and restart it. This will help create a new server connection for the game, which will update the privacy policy to the latest version.