We were getting the exact same error on all of our reports. They used to work but now we kept hitting the "authorization is required to perform this action" error - even though we were definitely logged in as the correct user. So that wasn't what the problem was. We even tried opening an incognito window and running the reports and we still got the same error.
We have eventually found a work-around. It turns out the problem is related to having multiple Google Accounts logged in, and then the Analytics plugin messes up when connecting.
To get around this, in Chrome, open up a new profile in Chrome. So click your user icon in the top right on the browser (just beside the three dots menu), and choose "Open Guest Window".
Then log back into Google Drive and run the reports. It should now work.
Josh