Hi there, i've had this issue going on for awhile. I have an unhacked switch and a hacked switch. With the hacked switch I have a decently edited save file - I did the tutorial, some extra stuff and then imported a completed island and edited the flags so it appeared to be finished. When I attempt to go and visit a friend online (hacked switch) I get an error code. The switch is not banned and i've only been able to do local multiplayer. I was wanting to go to a friends island on my hacked switch to give them items they need but instead id have to edit the items in->go to clean switch and drop em-> go to friends island on clean switch.
Around when the game first came out I used to travel to islands on my starting hacked file with no problem. I eventually transfered the save to my clean switch and started the new one on a hacked switch and cannot for the life of me figure out how to go online. Is there a secret flag im missing? Or is atmoshpere preventing it somehow? Any help is appreciative!