[Plugin: WordPress SEO by Yoast] class-sitemap.php – line 547 / Sitemaps went blank

Update: doing what i’ve done in the previous post gave me errors on GWT because tag loc on images is missing (GWT is right)

So i compared different versions of Yoast seo Plugins and i noticed that the line 544 of class-sitemap.php were always wrong until this version:

if ( !isset( $img['src'] ) || empty( $img['src'] ) )    ******LATEST VERSION

if ( !isset( $img ['sc'] ) || empty( $img['src'] ) )    ****** PREVIOUS VERSION

As you can notice first ‘src’ tag is different.
Anyone can give me an explanation about that?

Best

Solved.