Image Embed + Drupal 10.1 fatal error

This works for me!
Thanks!

I've modified this patch to add the backward compatibility mentioned in the change record. Can you test with this version of the patch to make sure it still works with your emails that include embedded images?

Still works.

I'm bumping this to major since this prevents mails from being sent out after updating to Drupal 10.

Committed.

Automatically closed - issue fixed for 2 weeks with no activity.