Can you please help me with the following:
I received this message via Webmaster tools on 03/18: We were unable to read your Sitemap. It may contain an entry we are unable to recognize. Please validate your Sitemap before resubmitting.
When I went to investigate the plugin on the site I notice:
That when I manually generated an xml Sitemaps for (post-tags, category, and pages) all was ok.
But when I generated a post Sitemap xml - a new tab opened but it was blank.
Any suggestions why this is happening?
WordPress SEO by Yoast is one of my essential plugin.