This video will save you 20 minutes.
Open Connect Social media Profile in menu [≡].
Tap on "Connect Instagram".
Now, Please make sure that your Instagram account should be professional. And must be linked with your Facebook page. Link Instagram with Facebook ↗
Now, if not Linked, Link Instagram with Facebook ↗
If Linked,
Tap on "Yes, both Connected" and Continue,
Tap on "Continue with Facebook"