I heard back from Penn-Plax customer service and they said that the media basket joint is now a part of the housing which I suspected. After 4 hours of messing around with the filter I am frustrated with it. I will try to get it set up again but this time I will not fill it first and try primming it to see if water actually flows into the canister.
Thanks, Brandon, for your help and advice. I hope the canister filter starts up this time.