2 Issues. Activation link error message and Supporter payment page not working

I have 2 issues that I think may be related.

First, when users follow the activation link it seems as is it is about to load a page, but then just a white page shows. When you refresh the page, it shows "There was an error activating your account, please try again.".
If you do input the key, it just repeats the message again.

Secondly, I have been testing the registration and when you check the box to sign up for supporter options, it never goes to a payment page, it just continues with the normal registration.

When I try to access the sign up page via wp-signup.php?Pro+Pundit=1 (which I got form the settings page) , it just goes to my home page.

Am I missing a file or something?