I keep getting an error with this code and I don’t know how to fix it or what it even is.
The servers have been unstable since the launch.
It's like that for every game that needs a heavy connection to the server. The servers can't handle the load of all the people trying to connect at the same time.
Continue trying until you log in. It should be stable in a week or so.
EDIT: Thing that seems weird is that the error code seems to always start by 802- but the last 4 numbers seem to vary.
EDIT2: Seems the servers have now came back to being stable. If you still encounter the error, now the possibility that it's you is high.