This solution did not fix the problem in my case.
The problem was that there was an extra line "379" which must have had one of those un-allowed line endings or the carriage return on line "378". This was causing the /usr/bin/oupgrade: local: line 378: not in a function error.
Deleted the extra blank line and all was fixed.

I am trying to install the to-do-list app demo from - https://github.com/OnionIoT/to-do-list
I have downloaded a local copy and entered that path into developer tools and get "Success!"
But on the main screen I just get a blank circle, no icon, and when I try to load the app nothing happens.
Am I missing something?