Thanks for the report!
You should be able to get rid of the problem by deactivating the Photon module under Jetpack > Settings in your dashboard.
I’m also looking at the different changes that were added to the latest version of WordPresss SEO to try to understand what’s causing the issue.
Hi – I have the same problem.
It went away after I reverted to WP SEO v1.7.1 (I didn’t try v1.7.2 since I updated directly from 1.7.1 to 1.7.3 this morning.
I found the older version of WP SEO on the “Developers” tab of the plugin page, should anyone need it (direct link: https://downloads.wp.xz.cn/plugin/wordpress-seo.1.7.1.zip).
Photon seems to be more beneficial to my site speed than WP SEO, so I rather stay with the older version until this gets sorted. 🙂
Thanks for reporting this issue. We’re currently working on a fix for it.
Since this seems to be a bug, we’re in need of full bug reports on GitHub. To keep all information in one place, please add your findings and bug reports to this thread: https://github.com/Yoast/wordpress-seo/issues/2001.
I will mark this topic as resolved, in favor of the thread on GitHub.