What's the flight number/date?
If the flight is zeroed-out in that cabin, you cannot use the Apollo seat map options. In those cases, Amadeus should be used instead.
Flights are NOT zeroed out.
For example use BOS-ATL for DL on May 6.
Pick flight 701 (the first one displayed)
Select Appolo Graphical Seats Coach. Only the F seats are displayed when I select Y, coach. Appolo text does the same thing.
Amadeus text is OK.