Images not displaying

I had a lot of images showing and working properly…then one day last week…nothing! Just the alt text in place of the image.

What happened? Can someone assist me in fixing this error.

Look here for an example post.
https://www.homebiblestudyonline.com/solving-problems-within-a-business-opportunity.html

All the post & pages seem to be doing the same thing.

Any assistance would be greatly appreciated.

Thanks,
Burt