any idea as 2 why when i submit a sitemap to google webmasters every 1 gets a green tick apart from the 1 below

/sitemap_blog_1.xml.gz

when i click on the error i get this

General HTTP error: 404 not found
We encountered an error while trying to access your Sitemap. Please ensure your Sitemap follows our guidelines and can be accessed at the location you provided and then resubmit.

any 1 got an idea why the blog sitemap is getting this error ?
MacLoving Reviewed by MacLoving on . Vbseo Error advice please ? any idea as 2 why when i submit a sitemap to google webmasters every 1 gets a green tick apart from the 1 below /sitemap_blog_1.xml.gz when i click on the error i get this General HTTP error: 404 not found We encountered an error while trying to access your Sitemap. Please ensure your Sitemap follows our guidelines and can be accessed at the location you provided and then resubmit. any 1 got an idea why the blog sitemap is getting this error ? Rating: 5