I just got a wahoo kickr core and bought a 9 speed casette for it. Went for a ride on zwift and after a few gear changes, things started getting loud and ugly. Eventually, the chain slipped completely off the bracket and I'll need to break the link and reattach.
I'm trying to diagnose what's gone wrong. In swapping from my 11 speed casette (Shimano 105 11-32) to 9 speed (Sora 11-30), what do I need to do to? Reindex gears? Change chain? Something else?