Some users have reported that embedded notebooks stopped working after updating to the latest version of Chrome.

Solution: Clearing your browser cache ("Cached images and files") usually resolves this issue.

Steps to fix it:

• Click the three vertical dots in the upper-right corner of Chrome, right of the address bar.
• Select Delete browsing data... from the dropdown menu.
• In the popup, set the Time range to All time.
• Check only Cached images and files.

• Click Delete Data
• Restart Chrome, then reload the post. (It may take a few minutes for the changes to take effect.)