Publishing a Google Docs Add-on: Project Key is no

Question

I am attempting to publish a simple Google Docs add-on, following these instructions: Publishing an Add-on

However when completing the configuration for Google Apps Marketplace SDK, I enter my script project key (found from file --> project properties) and receive the following error: 'Project Key is not associated with the current project.'

Only instance where I can find someone with the same problem (here) occurred when they created a project on the Google Developers Console instead of going through resources --> Advanced Google Services. This is not the reason for my error, can anyone shred any light onto my problem?

Any help would be gratefully received, Connor

Answer 1

Kept trying, did not change the way I tried publishing nor the project key I was entering and it worked after so many retries. Wish I could give a more detailed answer...

Answer 2

For me I need to go Publish->Deploy as API. Select the correct version and then the publish screen worked