The gitweb link seen in the diffs in review.openstack.org is broken – it still points to git.openstack.org in all the diffs I looked at, and that returns a 404.
E.g.
https://drive.google.com/file/d/1XVEyLnDOeJ0UUY16EfmDmV8029Ktp6HS/view?usp=sharing
Regards,
Sundar