Nintendo Switch NAT Traversal Process Has Failed

I FOUND A SOLUTION! If you’re using a T-Mobile router like I am, occasionally this happens when there’s a power surge or something like that. When they say “power cycle” I notice there’s a huge difference in using the app vs physically unplugging the router, waiting 30 seconds and plugging it back in. — This did the trick for me. Try this with your router. I’ve heard people say that attempting this multiple times has eventually lead to a solution. It worked on the first try for me =D Hope this helps!!