Wii Error Code 52730-52732 - Wii Error Codes

This error is caused by a device in your network trying to access the same IP address as the Wii console.

To solve this error :

Try changing the channel of your wireless router to either channel 1 or channel 11 which can increase download speeds.
You can try manually assigning your IP address or DNS to the Wii console. Your IP address and DNS can be found by running IPCONFIG/ALL in the cmd window or by searching the internet.