This error is caused by Nimble (And practically anything else what would connect you to a service which is not hosted by Nintendo Network) when you use nintendo network to connect to online services.It can be fixed by simply holding ZL on boot up which will temporarily disable nimble until you power it off again
Console
Wii U
Error Code
104-1970
Error Description
This error is caused by Nimble (And practically anything else what would connect you to a service which is not hosted by Nintendo Network) when you use nintendo network to connect to online services.It can be fixed by simply holding ZL on boot up which will temporarily disable nimble until you power it off again