Craig and Dustin, thank you for the help. Eventually it begin to work normally for Android devices, and little bit slowly for IOS devices. We get splash page, enter the mail address and connect to Internet.
At clilent list who are online, we also can see the clients mail address used for registration, but do we have saved on controller?
Because the idea of using email registration is to use collected emails for marketing, is there option to export file from controller with email addresses collected from email registration?