Trying to register with help.nextdns.io doesn't appear to work if you try to use a '+' extension in your email. It works fine with the regular my.nextdns.io site but not with the help site.

For example: `email@gmail.com` will work fine but `email+nextdns@gmail.com` does not.

I'm not sure about the logistics but it would be nice not to have to register separately for the help site from the main one.