Most of the admin pages for this plugin are blank for me. The regular dashboard elements are there: header, sidebar and footer, but in the area where you'd expect to see configuration settings, there is nothing.
This happens on every page except for Constant Contact and Registration & Profile. There's no error message anywhere, except for the Form Designer, which says: "The Constant Contact API plugin must be configured properly before using the Form Generator."
I have already entered my login on the Constant Contact page, and at the top, it tells me: "Your username and password seem to be working."
Am I missing something in the plugin setup?