Here is what you described seeing. We just need to click the “Sign in” button to add the “Open” button.
Once you have signed in with a Gmail account like your own or the open test account (firstname.lastname@example.org,pw:antarctissaballista), you will see this. Now you can click “Open with”
Finally, the original window now has a working button above the instruction to ‘Click “Open” above this image”.
Click “Open with Colaboratory” and you will have access to the notebook, the data, the code, and a live classifier.
Thanks for your patience!