I had a similar issue with second 910 as well. It worked fine for all of 20 minutes, but then failed to respond to commands. My resolution was more mechanical than technical. Specifically, I do not think my first (or second or third) install of the lock were seated properly enough for the deadbolt to cleanly open and close. I confirmed this to be the case by watching a few kwikset videos: http://www.youtube.com/watch?v=sGCN0zLgqy0&list=PLHORCPEuB2t6VQcXkSY-nJ9WH92qaGZI0&index=7 – see from 2:40. My lock didnt operate cleanly and would fail to pair (though, manually, the door lock worked fine). I didnt get the specific error message you received, though, my “Err 106…” was the same.
I installed this lock in the dead of winter, probably not the best, but live and learn.
Over summer I installed my first 910 and it went smoothly, no issues doing the initial deadbolt test… lock paired just fine too (though, I learned the hub needs to be within 3-5 feet of the lock).