This will most likely happen if you already have other accounts connected inside of Social Rotation.  To go in and manually connect your account through Facebook you need to do the following.  

Step 1: Log into your Facebook account.  Then select the dropdown arrow in the upper right-hand corner.
Step 2: Select Settings and Privacy.
Step 3: Select Settings.
Step 4: Select Business Integrations

Step 5: Select view and edit next to the Social Rotation App.

Step 6: Select the Page that you are wanting to connect to Social Rotation.