Flickr Gallery Photos not visible

I have used the Awesome Flickr gallery app on two pages of my site for the past few years and it has worked fine. However, over the past few weeks the photographs are not visible, although they are fine on Flickr. I deleted the previous galleries from AFG and created new ones, to no avail. The two pages are: https://www.apsmithimages.com/sports/ and https://www.apsmithimages.com/news/. I am using Google Chrome and Windows 10, but it is the same using Firefox and Windows XP. Thank you for your assistance.

https://www.ads-software.com/plugins/awesome-flickr-gallery-plugin/