Hi,
Image src/data-src was being generated with a double slash after the domain (https://www.briardclub.cz//images/... instead of /images/...), which some server configs treat as a broken path.
Fix: added a rewrite rule to .htaccess right after the first RewriteEngine On to normalize any double slashes to a single slash before other rewrite rules run:
RewriteCond %{THE_REQUEST} //+
RewriteRule ^(.*)$ /$1 [R=301,L]
After adding it, cleared Joomla + host cache and confirmed the image now loads correctly. Let me know if you spot any issues after deploying.
I need some time to investigate the root issues.
Thanks!