White Page in Facebook Canvas App

Question

I developed a Facebook App using PHP. This app have worked fine last year.

Now i have migrated the App to another server. Since then, i faced a lot of problems that i overpass with some workarounds.

But, there's an error that occurs when a user views the app for the first time on apps.facebook.com/my-app using google chrome

Refused to display 'FACEBOOK_URL_HERE' in a frame because it set 'X-Frame-Options' to 'DENY'. about:blank:1

I dont know what causes this error. But if the user navigate directly to the app url on my domain. Its opens. After that, If navigate back to the apps.facebook.com/my-app its open without error.

Answer 1

Modern browsers allow a web server to indicate via the X-Frame-Options header whether pages hosted by that server should be iframeable. You need to figure out where in your application or web server this is turned on and disable it.