how to solve this in webmaster ?

yaaash said:

You sure those page exists? Try going in to the url and see its redirecting to somewhere else or is it in correct xml format ? Better use a plugin google xml sitemap generator and it will take care of the rest.

Another thing you can try is try to make a dummy page with all of your urls and then fetch the URL as "fetch as google" in GWT.

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strannik-ps said:

Check Sitemap.xml validation
xml-sitemaps.com/validate-xml-sitemap.html
If there are errors, see
Manage sitemaps with the Sitemaps report
support.google.com/webmasters/answer/183669?hl=en

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strannik-ps said:

You do not have a ban on reading .xml in robots.txt?
on the robots.txt file is the XML Sitemap declaration?

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mbreezy said:

Quick question: what does the old version of Search Console say?

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