In Elements Organizer, you can create a PDF slideshow of your images or send an email that requires the launch of other apps such as Mail or Outlook. This process is called automation.
Starting from macOS 10.14.6, permissions for any app to perform such automation processes have to be provided explicitly to the app. You can do this through a permissions dialog that the system displays to the user on the first instance that the app has attempted to launch another app.
Similarly, Elements Organizer requires permission to use the system “Mail” or “Outlook” apps for you to create and share PDF slideshows or sharing your images over an email.
After installing Photoshop Elements 2020 or Premiere Elements 2020, when you use the “Share PDF” or “Share via Email” feature for the first time, you will receive a permissions dialog similar to the screenshot below: