Don’t bother with Tech Support. They’re dumb as rocks. They wanted to troubleshoot everything with my network even though I told them that according to their own forums this is a wide spread problem. But I played along and did all that they asked which consisted of setting up DNS on the switch and putting it into a DMZ. After all that I still get the errors. It’s clearly on their end.
I have today off from work and went to five different stores so I could pick up Just Dance 2019 to play with my sister in-law tonight, she's so stoked. Unfortunately, a vast majority of the songs she wants to play are all on Unlimited. I created an account on the computer since I was unable to do so using my Switch, which is especially odd considering the network connectivity is fine enough to purchase games from the Nintendo eShop...
This is incredibly unfortunate. I honestly have to say, I will never buy an Ubisoft product again, unless this issue is resolved today. I understand if this is a new release, but this has been out for long enough to not be an issue. Days off don't come so often, so when we get them and waste them trying to troubleshoot your products, frustrating is the nicest way to put it.
Sincerely,
A Potential Future Never-Ubisofter
Same issue here. A lot of people on Twitter contacted UbisoftSupport about this in the last few hours and all they receive is a troubleshooting link. They sent me a DM saying "We have no further information at the moment, however, the team are looking into this.", although the first report has been sent around 24 hours ago. Looks like they don't care, I'll try to get a refund as well in case it doesn't work in the next few hours. It's clearly not our fault.