Edit 2: Games wont work online. My internet seems fine so idk what the issue is
Well, you posted the error code but not what you were doing to cause this error. 
But yeah this is just a small thing that happens, but I’m not sure it’s known why.
What games are you having trouble connecting to? What error codes for those games?
Minecraft, it’s disconnecting me from “Nintendo” network and won’t let me go online
But were you able to get online sometimes?
It’s possible its just a Wii U thing. sometimes it doesn’t like connecting to the internet.
It fixed itself lmao idk wdf that was about
Lol okay. Can I close this thread, or do you need more help?
Yeah I meant to respond sooner but the forum website ceased as well. I’m all good now!