Some people experience issues adding their Facebook Pages where after clicking the OK button in the window below:

Facebook should direct you to this here. Make sure all pages you would like to connect to Sked are here and say CONNECTED!
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You must be logged into a Facebook user account (that is a "person" on Facebook) that has business administrator access to the Page (e.g. via Business Manager).

When you are logged in as a "person" you will see the name of the person in the top right corner of the Facebook home page: