Registering new user from signup page not working

Hello, i emailed you and you asked me to ask the same question here but didnt answer the question, ... i have created a free subscription already, but when i go to the https://site.com/register page and try to register a new user i get a error saying "" the given data was invalid" this happens weather i go directly to the registration page or even if i click on subscribe choosing from the free plan i have created in the admin area. please advise as i have checked through every question on here and read the docs for the software and it isnt covered anywhere