"Authorization is required to perform that action"
Why do I get this error?
This happens when you multiple Google accounts in your browser. For example you may switch from firstname.lastname@example.org to email@example.com. This is a documented Google bug.
Load your browser in Incognito/InPrivate (Ctrl+Shift+N) mode. Login to with your Google account and run the add-on.
For every Google account create a person/profile in your Chrome browser.