If you’re using either iGrann or iGrann Pro for Instagram access on BlackBerry 10, you’ll want to go ahead and load up BlackBerry World to get the latest release downloaded. A small, but important update, to both versions, has now gone out that will correct the error message “login_required” some folks were seeing when attempting to login. If you still get the error after the update, try uninstalling and reinstalling the app.
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