Open a new browser on a desktop/laptop device in incognito mode.
Enter the following link into the URL line of your browser:
Click Edit Settings
Select ALL Instagram profiles here and click Next
(If you can´t see your Instagram account here, you´re not an admin of this Instagram account, or your Instagram account is not connected to a Facebook page.)
Select the Facebook page your Instagram account is connected to and click Next
Select ALL options here and click on Done
Go to your Facebook page your Instagram is connected to, click on the left side on "Page Settings", click on "Instagram" and check if there is a blue "Review connection" button.
If you see it, please click on it. If you don´t, never mind.