I saw in the recent updates that this was fixed, but it isn't for me. I go to "Email photo," the "Apple Mail 1Photo" dialog opens. I used to be able to just click SEND and it would create an e-mail in Apple Mail. Now the "Preparing file for E-mail" counter counts down, but nothing makes it to e-mail. With or without an e-mail address filled in.
Greetings, Updates to Camera Raw, Lightroom Classic and the Lightroom Ecosystem products for Desktop, Mobile and Web, were released today and contain a fix for this issue. Please refresh your Creative Cloud application and install your update when it becomes available. Thank you for your patience.