DiggDugg

I am having the same problem. I am using ZenCache Pro Version 151114 with Yoast Version 3.0.4 Sitemap and WordPress 4.3.1 with PHP 5.5.30

I am closing this thread, as I have managed to resolve.

Thank you, Sperry77, for the heads-up, and confirmation!

Same here and would add: think carefully before applying WordPress SEO Sitemap.

Speaking from painful experience and hours of works during the last couple of weeks.

The support posts highlight serious issues. (likewise, W3 Total Cache)