Hello, @JP,
To edit the static blocks, first, make sure that you have enabled the post types from the Elementor settings like you to see in this image; https://postimg.cc/TK9GjdYX after that navigate to the Dashboard >> Static Blocks you will see that you are able to edit the blocks with Elementor.https://postimg.cc/PpLPFpPD
I solve it on your site the above result image is of your site.
Regards 8Themes Team.