Am I F@&k’d?

I’m someone who takes care of their gear. It’s for home use only and everything is in great working order. My problem is that my Serato SL1 box finally flaked out. Understandable after so many years. I’ve been wanting to move into rekordbox so I figured this was the perfect time. My current set up is (don’t laugh) 2 cdj 1000 mk3’s, 2 brand new Technics 1210GR’s, a djm-800, and now the rekordbox interface 2. I’m using my 2019 MacBook Pro for my music files with rekordbox. The problem I’m having is connectivity. I can’t get signal from the cdj through the interface and to my mixer. I appreciate any help!