The short answer is, even if it works, you are going to bump into issues.
Try another cable, I hope one that is under 6 foot.
If that doesn't work, I'd be looking for a receiver firmware update.
If that doesn't work either, new receiver am afraid. Upgrading TV to UHD opens a $$pandora box.
p.s.: I made a cursory look at the Yamaha, forgot to look whether it is ARC capable, because it must be, ARC must be present on both pieces and ENABLED else they won't talk.