cannot add new photos to an existing gallery
I am trying to add some new photos to an existing gallery. There are already 19 images in the gallery and I'd like to add a few more. When I click on the browse button to go to the media library, the library never loads. I just get the spinning loading icon forever.
On other smaller galleries, when I try to add new images it sometimes deletes the images that are currently there and just puts the new ones in. In the smallest galleries, it works perfectly and adds the new images with no problem, keeps the current images and works just the way it should.
Is there some limit on the number of images that can be added to a gallery? Can you help me resolve this issue?
The domain in question is https://www.2ndcareerdroneservices.com/photo-gallery/
Thanks so much.