Whenever I want to play online with other players (not in the option "with friends") it says an error has occurred with the error code 018-0521. I've taken nintendo's advice from their support thing and nothing seems to fix it. Whenever I go on the option "with friends" there is no problem at all. My friend has gotten the same error code but instead, she is unable to connect in the "with friends" option, but she is able to connect fine with the "with anyone option". This doesn't make any sense honestly I've reset everything and done what Nintendo support has told me to do and I've updated it but nothing has solved the issue and it really bothers me. Anyone know what this issue is or how to fix it:(?
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