Reviews – Restrict number of reviews

Hi,

I would like to use this option:

Restrict number of reviews – One review and verified owner required(the customer must have bought that product)

My problem is when I order an item and I am trying to write a review, but I did not logged in yet, after writing a review I got redirected with the messsage: Only customers who bought this product can leave a review.

Is there a solution to get the error message at the form and maybe the possibility to offer login for the user?

Thank you!