Gaming [Help] Mhxx connection error on switch after save data transfer

[JulianSchmidt]

Iam playing monster hunter double cross(mhxx) for switch until 3 days.

I used my 3ds to transfer the save to switch.

After transfering i created a new character on 3ds to play with my brother mhxx(i play on switch ,my brother on 3ds).

But if my brother go online and create a hub exactly when iam online,my system says connection error...if i go online same error.

But i cant trade fc on 3ds and switch, i must create a hub online and tell my brother the hub id.

So i cant play with my brother.
:/

Anyone has an idea. I thought the error appears because we have the same nnid,but i dont know how to fix :/

Thx in advance