This might be a stretch but did the wii shop channel get ddosed instead of nintendo just flat out shutting it down. Here me out:
1. The error code is for wireless interference maybe this is a ddos since wireless interference could mean that.
2. Nintendo quietly shutting down wii shop channel...
Technically for a month there I had Frontier FIOS 500Mbps and Spectrum 1Gbps (they got me on Spectrum because it was a little cheaper for double the speed)
I mean what would you really need that fast for tho, 500mb streams 4k fine. 1gb should be fine for 8k eventually. That's what I just switched to Spermrum.