I think it might be coming from a combination of contact importer and facebook connect but i am not sure what is causing it to happen. When a user trys to join the site with facebook connect it works just fine. however when a user is sent an invite request through contact importer and then sent back to the site, if they go to sign up using facebook connect then they are greeted by 500.phtml and under debug mode the attached is the result. I am somewhat new to oxwall and i am just trying to make sure everything is working 100%
Also, and i forgot to mention this. if the user hits the back button in the browser they are logged in, their account is valid and everything works for them...