Read More clicked shows content b4 disappearing the entire page

Clicking the Read More Pro button flashes its contents for an instant on screen. Then the page, previously visible, disappears leaving only these words. “No Results Found. The page you requested could not be found. Try refining your search, or use the navigation above to locate the post.”

The Post is easily re-opened showing an image plate and the Read More button (before other buttons). But the Read More button clicked is like a hand grenade!

Divi accesses the Read More text for editing.

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