Post Content Not Appearing

Hello,

When I create a post it appears on this page like it should:

https://petalumaartscenter.org/blog/

However, when I click on the title of the post to go to the full content of the post, the page that appears is blank except for the banner image and the nav menu.

What is causing this problem and what do I do to fix it? The content of the posts should have images and text that shows up but at the moment it’s giving me zilch, nada, nothing….

Thanks!