Developer Hi-Rez Studios announced today that it has decided to shut down its team game servers for the Nintendo Switch version due to the lack of performance in that version and the team does not currently have the resources to focus on all versions.
The Midnight Masquerade update that is available today is the latest official update for the Nintendo Switch version, and this version will remain playable until the release of the next update at the end of next June, and the team aims through this decision to focus better on other versions. You can transfer the achievements that you have made from the Nintendo Switch version to PC or Xbox version by creating your HiRez account.