We appreciate your patience regarding this matter. I understand that you are having an issue with unable to connect your wireless network.
Try taking a look here for more tips about troubleshooting that network error code: What should I do if I cannot connect to my home network or ...
We recommend rebooting both your wireless router and your Roku device.
I'd also recommend trying to connect your device to an alternate network, such as a mobile hotspot.
Keep us posted with what you find out