Image has stopped displaying on webpages

Hello,

A bug has appeared on our site– certain images have stopped displaying properly.

Here are three examples where the caption is displayed, but the accompanying .jpeg does not appear.

https://environmentalhumanities.yale.edu/event/energy-and-humanities-int…

https://environmentalhumanities.yale.edu/event/andrew-kahrl-university-v…

https://environmentalhumanities.yale.edu/event/keywords-justice-preserva…

This is a new problem that didn’t happen during our use of the site laset year, and images from old events now also are not displaying. 

Thanks for your help!