Topic: Wii U won't connect to my WiFi/internet

My router setting haven't changed. All the security settings are what they should be, and the password is correct. Does anyone know how I can troubleshoot this?

Is your Wii U close to your router? What is the error message that appears when you try to connect?

My router is in the same place it's always been, since 2013. Error Code is :103-1604 "Please confirm that your Wi-Fi network is set up for use and that the SSID has been set correctly"