I am setting up this forum plugin to integrate with Facebook. When I click on Web Preview in Facebook, I see my app page with a link to My Website. When I click on that link, it takes me to my site and tries to load the Forums page. The link in the address bar is http://safeharbourtherapy.com/forums/?fb_source=appcenter&fb_appcenter=1&code=AQAvI1WcE34Ox_rOF50eZOcvDz8Wgo7b1JZzN8kSeYKYMw7FGwDYJc7ngNE0zOWwkquHZblw18E9n2VHKuN7k15Z_C6Y6ddxo2z7MX4L2yOUukK6lNzryNb86LLOi-T7RFY_Z2u1vSM7ctMw--imemYZFqoHJPzIwBVR4gjcwSwWWlAa8CUxB3Z39kDQpL4cCSAKeEkNFaNHFMmTOkxvh_y5
The error message says: "Sorry the page you requested could not be found. Please try again." as though it were a 404 error. If I click the "go back" link, I'm able to see the forum home page.
Any idea why this is happening and how to fix it?