I can't complete or save my email. I have not exited the document because I don't want to lose the contents I've already written.
I apologize for the experience you're having with your email. Are you still in need of assistance? I have taken a look and can see you were able to recently send out your email campaign successfully. If you are still having this experience, I would suggest testing in a different browser or a private/incognito window. Are you seeing the same experience when testing your browser like this?