After I set up my app as described in the README, I got the following text and no sheet shown up:
It looks like your Spreadsheet is private, please change its access to Anyone with the link and then try again
But my google sheet opened its access: https://docs.google.com/spreadsheets/d/1tKMSI7XQ24WYWOAO7k8_qbdziULfRTQryrzSQHPGhjU
and I set the google sheet id using the middle string -- 1tKMSI7XQ24WYWOAO7k8_qbdziULfRTQryrzSQHPGhjU
Which part of above is wrong?