I couldn't resist and I did take off the one side cover I do have. There is a white QR code looking thing but nothing else in there.Never heard of this before. Many of us have replaced batteries and had no issues starting the bike with the key fob present. Does the bike have removeable side covers? Sometimes as a long shot the master PIN can be located there, but it is a long shot. Some dealers put it there. I think it's possible to get the master PIN just from the VIN number, but dealers may not be comfortable because they would be too easy to take the bike.
Maybe it's a hell of a coincidence, but maybe the key fob battery is toast. Those take the standard CR2032 batteries