It's very easy to reconnect your Facebook account with Fan Page Robot.
Step 1: Click on the "Deauthorize" link to deauthorize Fan Page Robot with Facebook, then you will be automatically logged out of Fan Page Robot
Step 2: Go to My Account, log into Fan Page Robot again
Step 3: Click on the "Login to Facebook" link on the left
Step 4: [IMPORTANT] Always click on "Okay" when you authorize Facebook with Fan Page Robot. We care about your privacy too, and only request the minimum permissions needed to make the app work.
[Optional] Step 5: If you are on a Pro Plan and have more than 3 fan pages, it should pop up a screen to ask you which fan pages you would like to manage using Fan Page Robot.
If you are still experiencing any issues, please contact support.