Google sitemap error

Hi yeast team,

I am getting sitemap error and need your help to fix this. Find here a screen shot – http://screencast.com/t/fIB1gIaK8Of. According to google information it seems to be a error of not proper guideline instruction created sitemap. While using the links they are working.

I also used your instruction – http://kb.yoast.com/article/269-missing-or-invalid-date-in-xml-sitemap – but still this failure is open to be solved.

Looking forward to your helping instructions.

Best regards, Alex

https://wordpress.org/plugins/wordpress-seo/

[ No bumping please. ]