First i'd try to resync your iPhone with FB. Disconnect your FB from your game and then uninstall the FB app completely. Once you've done that just restart your iPhone, open up Candy and click connect. This time what will happen is a browser window will open where you can sign rather than the FB app. Once it's all connected again download FB again.
That's what I did anyway when my mobile was no longer syncing properly, seems the issue is coming from FB app in my opinion.
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Answers
First i'd try to resync your iPhone with FB. Disconnect your FB from your game and then uninstall the FB app completely. Once you've done that just restart your iPhone, open up Candy and click connect. This time what will happen is a browser window will open where you can sign rather than the FB app. Once it's all connected again download FB again.
That's what I did anyway when my mobile was no longer syncing properly, seems the issue is coming from FB app in my opinion.
Thanks for your help. It hasnt solved my issues but Ill keep trying.