Play the intro and Cutscene until you are brought to the cover screen. The only plausible thing is that Nintendo doesn`t connect to Rocket League servers on its own, but relies on user calls. This means that every time you have already launched the game, an updated license agreement is loaded onto the switch, causing disruption. Before you play Rocket League, you have to accept a license agreement. This license agreement is updated occasionally, prompting players to accept each time. If a player does not leave his game so often, he will probably face an error that will prevent him from playing because he has not accepted the new license. I went back to my own machine (which didn`t have the problem) and I checked. My license is the same. So it seems that the computer is as licensed as our other machines, but I`m still saying why it`s asking to accept the license agreement.