i have already submitted my website's sitemap to google webmaster long back but there is one error.Now i m trying to access my sitemap i m not able to open it also on http://www.techdoper.com/sitemap_index.xml.
This is not a spam just representation of my error.
It seems you disturb your sitemap settings from backend
shall i delete my sitemaps and resubmit again ?
Simply deactivate and delete your Yoast SEO plugin once, again install and active then resubmit your sitemap to Google. That's all !!