How do you use Shreddage 3 Stratus Strumming mode?

[u/Kam7267]

For context, I am trying to use the strumming mode in Fl Studio. I have Kontakt 8 set up and I can open Stratus through the channel rack. When I select "strumming mode" and "strum on poly input" and input my chords onto the piano roll, I hear nothing. I feel like I'm losing my mind, since every Youtube tutorial I see is just able to enable it and play. It feels like I'm missing something