While we wait until the official Instagram api will available for public(now is in beta version https://developers.facebook.com/docs/instagram-api/content-publishing), i’ve written a new Instagram publish class which allows to publish on Instagram without errors.
The class will be available from the next update. You have to turn your Instagram account in Business account. You can do that from your mobile Instagram app.
The new class for now allows to publish photos, no stories and video.