After some research, I finally got ./update to run without any errors. Apparently my version was out of sync with the version on github. I opened up a terminal window and typed in git stash which moved the files out of sync to a separate location. I then ran ./update and a list (index) of changes appeared on screen. The ./ update command finished and then I ran ./build sbitx. My Sbitx v2 is in sync with the version on github. I am not a programmer or even a novice a software, perhaps someone here can clarify what I did. All I know is that it has all the latest updates.