Can’t insert images

Hi mates, I’ve just installed hestia free with energy panels demo and am using Elementor, the problem arised is that with Energy Panels Demo I can’t change the big-title section background image nor on the ‘why energy panels’ section background, they came with a grey default image and are unelectable for changing.

I’ve search the entire documentation and can’t find the reference nor any guide for changing these images.

Please if you can point me in the right direction, I’ll appreciate it very much.

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