Nintendo error code: 2618-0516, no global online game router: FritzBox?

I don't know if I'm happy about the demo of Splatoon 2 or just annoyed.

Today I wanted to test Splatoon 2 as a demo that will be available until May 6th. What makes sense before you buy it…

But currently it seems to be rather no. Since I can't even play the demo.

But other online games like Mario Kart Global spin around too.

I get the error code: 2618-0516

Help google say my internet settings don't match…

They were checked and changed to

Fixed IP
Host open, dmz does not exist in Fritzbox… All ports were opened
NAT C… Before that it was D

Personally, I don't like to be completely free, not even with the Switch.

But no matter what I do it does not help… I find the connection even weaker since then…

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Curiously at Animal Crossing it worked without problems before…

Does that use other means?

Dragon Ball Xenoverse hadn't made the mistake either.

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So far I have not been able to find a solution for Fritz Box that is running…

Does anyone have an idea how to get something working?

Nintendo Switch Online I have…

Disconnect the Fritzbox from the power for 2 minutes and then plug it back into the power supply, maybe it'll work, sometimes only a few Wi-Fi devices went, then everything went well. I also got a Fritz Box

:( Unfortunately no effect… Ready 2x tested…

Too bad and the switch has been hard reset, hold the power button on the top left for 30-45 seconds?

Today I downloaded the demo of Splatoon 2 and will try it out later, hopefully I can