Hi
I see you have already solved this issue but just in case anyone else comes across this in the future I had this today which was related to two things:
1 – If you go into wordpress -> settings and update your permalinks by just saving this fixed the issue for me.
However at the time I also had ithemes security plugin set to protect system files and disable file writing so I had to temporarily disable those two bits before updating the permalinks.
On some other threads for a similar error you can go into yoast sitemap settings and disable then enable the sitemap.
Also you can change the posts from 1000 to 100.
But none of these last two made a difference for me. It was the updating of permalinks that worked.
Hope this helps
Hi Shadzster,
My issue is not solve (post page)
check out this page http://www.kearsleys.com/post-sitemap.xml
I am try to updating as per your requirement but steel get 500 Server Error
check out my permalink setting http://postimg.org/image/wx5md0ap1/
Help me to solve this issue
Thanks
Jwalant Bhandari
Eu estou passando por esse mesmo problema depois que atualizei o plugin Yoast SEO
