I am using the latest version ov wordpress and wordpress seo plugin and today I noticed on GWT that my sitemap for categories on a custum post type is getting this error "Your Sitemap appears to be an HTML page. Please use a supported sitemap format instead."
My /sitemap_index.xml contains:
And they all are working except this (/question_category-sitemap.xml)
When I clicked on the link from GWT (/question_category-sitemap.xml) I was redirect to my home page...
I have followed a small check list to solve this:
1- I did a double check on my re-directions and none seems to be wrong or have to do anything with it.
2- Disabled all plugins one by one and the error persists
and at the end I still remain a bit lost on what do do to solve the problem...
Any ideas on what to do?