If you come across this error: "Instagram account is restricted." - It means that you didn't fill in your personal details on your Instagram account.
What to do?
👉 Please open your Instagram account settings in your mobile Instagram app, and fill in the personal details. Instagram has started verifying business accounts for security reasons.
💡 Once you filled in all the required data, please refresh your Facebook account in ZoomSphere settings to update Instagram API. 😉
Then you should be able to publish again.
💡 Please note, that it might take a while for Instagram to unrestrict your account.