I am still having this same problem only it now asks me "have you clicked 'Allow Access' for this plugin on the Goodreads website? first, if I select no the window goes away and nothing happens. if I select yes I get this error
calibre, version 0.8.48
ERROR: Goodreads Failure: The request contacting Goodreads has failed. Please try again.
Response Code: 401
Invalid OAuth Request