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Question

I am making publication via [FBWebDialogs presentFeedDialogModally...]
It works fine.
But if I delete application in the facebook settings and try make post again, I

Answer 1

You can get this error when your app is not available to the public (big slider on "Status & Review" page of the Facebook developer control panel says "NO"), and you have not added the account you log in with in the app as a test user.

I had this situation where I had not yet added my test user (I am using a difference account than my personal one for testing) as a test user to the app.

You can add your test users in the "Roles" page of the Facebook developer control panel.