This error is caused by an issue with the Wii being able to connect to the Nintendo wireless (Wi-Fi) USB connector, but blocked from reaching the appropriate server.
To solve this error :
Check to see if your default IP address of your router in your network is 192.168.0.1 or 192.168.1.1. If so, change your IP address of your router in your network to 192.168.2.1 and try to connect again.
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