Error code

Nintendo Switch 2306-0520

NINTENDO SWITCH2306-0520
Game/Platform Error· An error code shown by a game or gaming platform/launcher.

What it means

The console was unable to join an online match..

How to fix it

  1. Restart the console.
  2. Change DNS settings to manual and enter 8.8.8.8 and 8.8.4.4.
  3. Power cycle the modem and router for 30 seconds.
  4. Contact your ISP if the issue persists.

Not affiliated with Nintendo Switch. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.