@michelle1962 I’ve tried also with only minor success. This is what I did, while on the property edit page:
1. Click “Add Media” button, above the Editor area/below the Title
2. Filter to “Uploaded to this Post”, which is likely empty (this was the key step for me)
3. Click the Upload button; select the images form your computer
4. Instead of clicking “insert into post”, just click the “x” close button
5. Click Update, to update the property listing.
This minor solution obviously would mean you have to upload new images to your site. I’m hoping there’s a better way to attach images from the media gallery that have already been uploaded, as that’s why I say minor success. Hopefully it works for you too.