Sometime Facebook updates things, or connection is lost between Retriever SMM and Facebook. Many smaller problems can be fixed by reconnecting to Facebook again.
Step 1: Access the Settings panel
Step 2: Under your personal settings click "Disconnected to Facebook"
Step 3: Click Connect to Facebook to start the linking process
Obs: If you get this image press "Edit Settings"
Step 4: Go through the process until you get the message that you have successfully linked Retriever SMM to Facebook. Press OK and you will be taken back to Retriever SMM again.