Hello,
Thank you very much for choosing our theme and for contacting us.
Please make the full backup of your site as well as the Theme settings export and check the issue on the Storefront theme to detect if our theme causes the problem. If you see the same on the Storefront, contact your host provider and ask them to fix the settings. If you security is ok on the Storefront, check your site thoroughly once more and remove background images you could use within the site.
Best Regards