Found some info, the update is a patch to fix some glitches.
You need to have the latest shopping channel update v20 IOS56 the nintendo servers are looking for SCv20.
I updated the shopping channel using Dop-Shop on the Homebrew channel
and then downloaded the update in multiplayer mode.
All works fine now.:Clap:
LIVE FIXES:
11/23
o Unable to connect to multiplayer without switching profiles
o Freezes during matchmaking when using the LAN adapter
o Players were sometimes kicked out af a game right before it started
o Changes to custom controls and options were not saving correctly (“Unbound glitch”)
o Wager match specific bug in Radiation that caused dead players to teleport
o Fixed "care package glitch" where player could get infinite number of 'Sam Turret', 'Care Package', and 'Sentry Gun' killstreaks
