Before you will be able to proceed when using Rife Pro, you have to first register license code.
After you start your subscription for Rife Pro theme, you will get e-mail with confirmation about that. There you can also find license code that is needed to activate theme and to use our support forum.
Please see screen shots below, that explains where to add license code:
Where is the license code in e-mail
Where to register license code in theme