Same issue. Tried wireless, hardliners, factory reset. Possibly related to their email security? Not sure why it doesn't think a Gmail account with 3 roku devices already registered isn't valid.
I am having same problem. Last night I got the activation email and when I clicked the link i got a message saying the site was down for maintenance and should be back online shortly.
12 hours later I’m getting the can’t reach you by email message.