Something Went Wrong

Trying to start a Realm (to get it off Switch, since you don't care about fixing that version) and moving my world over, but the game says: "Something Went Wrong. We're unable to connect to the store. Maybe check your internet connection?" Now, I've already purchased a new router, and a new Ethernet dongle for my Switch, to make sure it's not my Internet that's causing the lag. I'm getting 70.0 mbps down, and 30.0 mbps up, with less than 45ms of ping/latency, so I know it's not my Internet connection. Maybe fix the game.