X-Frame-Options and Embed PDF

I’ve been unable to recreate this error.
Can you post a URL?

Thanks for the help!

https://www.grtc.org/manchuarchery/lessons/using-the-manchu-style-thumb-ring/

What browser are you using? It seems to be working for me in Safari, Chrome, and Firefox.

Safari 5.1.7 on OS X 10.6.8

Maybe refresh the page?
I’m sorry, I’m not going to be of much help. The embed code is appearing correctly though, so any issue must be between your browser and Google. Perhaps privacy settings?