hrr216k9vka self propelled not longer working whatsoever

had the mower for 2 years almost to the day and all of a sudden the self propelled mechanism is just not working at all, no pull whatsoever. I tried adjusting the bolt/nut but that's yielded no results. I don't have as much experience disassembling the mower to verify if the smart drive cable is or is not attached and can't seem to find a direct answer anywhere online as to how exactly to diagnose this myself. Any information would be greatly apperciated and like i said i think i should be well within the 3-year warranty.

Details:
Honda HRR2169VKA
Serial Number: MZCG-9483645

hrr216k9vka self propelled not longer working whatsoever