Thanks for the note.
We recommend rebooting both your wireless router and your Roku device. Alternately, I'd also recommend trying to connect your device to an alternate network or mobile hotspot. If you are able to connect without issue and finish your activation, if you are able to activate your device with the alternate network this usually indicates an issue with your network or password. In that case, you might also try changing your network password (avoid using any special characters from your wireless network password) to see if that resolves the connection issue.
Keep us posted with what you find out.
Same issue, but have not been asked for e-mail. Screen with activation code simply did not appear. Re-set and role went from initial screen straight to Home screen.