Hello, @Achaoui Abdellah,
I have checked your site and found no issue. I have modified the footer, pre footer using static blocks and the changes are working fine on your site front end as well. I have captured a video for you for a better reference. Please watch this video : https://www.veed.io/view/3fdb61eb-f85d-4d6a-b51d-b8c7c33a5af5?sharingWidget=true
Regards 8Themes Team.
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