that's weird.
I am on Windows 7 64bit
Chrome 57.0.2987.133
Exact steps are
1. Click Export to any format(e.g. JPEG)
2. Click Export button, prompts how do you want to export, click 'Google Drive'
3. Loads for Authorizing
4. It prompts for signing in, click sign in
5. It prompts for login in to gmail again (which I have already logged in my gmail, I use google drive to create a new drawing)
6. Sign in does seem to work , it stays in the prompt for sign in page at (4)
7. I redo (5-6) again, but then it fails with the message "The feature you requested is currently unavailable. Please try again later."