Hi, looking at your site, I do not see the white space. Did you already solve this?

What browser are you using?

Very strange but apparently, Firefox gets a different stylesheet… when accessing https://bewaf.com/blog/wp-content/plugins/easy-fancybox/fancybox/jquery.fancybox.css with Firefox I see a compressed stylesheet while in Chrome I see the expected non-minified version. No idea why that is happening but the result is a missing border style rule which breaks the layout in Firefox.

You seem to have the WP_DEBUG flag set to true in your wp-config.php… Set it to false and test again.