Originally Posted by kiwidude
The best bet for these issues is to contact Goodreads support. From time to time they have issues with their servers. The plugin has not been updated in a very long time, so clearly nothing in the code has introduced a problem. The issue therefore will lie at the Goodreads end... every single time this sort of issue has come up on this thread in the past it has come down to it being resolved several days later with nothing being changed in the plugin...
Thanks for your help, today I tried again and voila, worked on first try!