This seems like a design decision on Drive and not an evil plot to hold your files hostage. To make it work again, you can enable third party cookies exclusive

This seems like a design decision on Drive and not an evil plot to hold your files hostage. To make it work again, you can enable third party cookies exclusively for drive.google.com. Every modern browser will let you do this per-site, and if you change settings like this, I guess you should expect to do some manual tweaking once in a while.