cannot modify header information via FB

  • when opening the link to my site homepage through the iphone facebook app – ie. trying to login to the site using the inbuilt browser, the login/register to allow access works ok but instead of being redirected to homepage I receive this error message:

    Warning: Cannot modify header information – headers already sent by (output started at /home/XXXXX/plugins/facebookall/helpers/facebookall_process.php:12) in /home/XXXXX/wp-includes/pluggable.php on line 896

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    In my Facebook App I have the app domain set to the same domain as the homepage, Website with Facebook Login is set to my site URL, App on Facebook is set for canvas URL & Secure – main home URL with trailing slash.

    Any idea why it’s unable to load the home page? This is an unmodified install of the plugin.

    https://www.ads-software.com/plugins/facebookall/

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