Having an issue publishing my form to facebook

Hello, when I try to publish my form to facebook, it keeps giving me this error message, "This page does not have permission to install the custom tab.".  Is there an app that I need to add to my facebook page for this to work? Thanks!

Have you followed the steps from this guide - Adding a Form to Your Facebook Page?

Please note that the Page Tabs feature is only available to Pages with 2000 or more fans, or pages managed by whitelisted apps - https://developers.facebook.com/docs/pages/tabs