Why am I being asked to turn on two-factor authentication on my Facebook profile?

If you are Admin of a Facebook page where two-factor authentication is enabled, you will also need to enable two-factor authentication on your personal Facebook account, otherwise, your role on the page will change from Admin to Moderator.

This means that if you try to create an auto-post on Iconosquare for the Instagram profile which is linked to that Facebook page, you will receive an error message advising you that you need to turn on two-factor authentication on your Facebook account.

This article explains how to turn on two-factor authentication on your Facebook account:

https://www.facebook.com/help/148233965247823