The share button disappears when I try to send more than one photo at a time. What has changed?

I am a real estate photographer. I send my clients their photos with AdobeSend. When I am ready to send the link to the finished photos to my client, I used to select all the photos at once that I want to share, and hit the share button, which takes me to the place to type in email address. Now, the share button is gone if I want to share more than one photo. I can't work this way. I can't send 40 photos one by one. How to I correct this?