More images not loading

Hi, I am using Dispatch design from your GeneratePress site library with plugin WP show posts and have technical problem with loading more images after click on +more. I have tried to deactivate plugins that may be impacting this issue, but nothing has changed. Also waiting longer time has no effect.
You can check it on this link (example): https://www.hravozdravo.sk/category/hravo/podla-typu/pokusy/

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