You cannot use this feature because we turned it off based on our security research.

While this is a very convenient way to use Google service on multiple devices, when you share your data with your private PC or account, it may lead to data breaches or other security risks.

If you'd like to share your bookmarks with other devices you own, export the data on one of them and import them on others.

Import bookmarks & settings (Google Chrome Help)
https://support.google.com/chrome/answer/96816