Can't Select Fields at All

I recently installed the developers version of gravity forms. I was trying to install the authorize.net add-on via the dashboard, but kept having an issue so I just downloaded it and manually uploaded it through the pluggins. I managed to get all my authorize.net info in there sucessfully. However, when I went to gravity forms to edit or add a new form, I would click on the fields on the right hand side and nothing would happen. I opened up my concole in my inspector in chrome and noticed an ajax error: "uncaught syntax error: Unexpected Token <". This would come up every time I clicked on the field on the right hand side. I deactivated all my other pluggins, uninstalled gravity forms and the authorize.net add-on, even installed wordpress 3.4 with no avail. Deleted my internet cache. Tried a different browser.