The Update Button on an edit page isn’t working

It’s the Home Page – https://brody-pr.com/. I’m trying to change the image. I’m in the backend, changed the picture, saved it, but when I hit the Update button. Crickets. I’ve read forums about the problem, and they talk about changing to 2-columns, but I don’t even see that option. My boss uses Muffin Builder, which is new to me, but…the update button should work. I need the get the image updated. This is so frustrating!

The page I need help with: [log in to see the link]