[Error] Invalid publication label [Description] The publication label that you selected when submitting this Sitemap does not correspond to a known publication in the Google News database. [How to fix] 
To check your site’s publication name and language, run a site: search [site:example.com] on the Google News homepage and review your articles. Please include this publication information in your Sitemap by updating to the new format, which involves attaching a tag and other relevant tags to each url in your Sitemap. Learn more here.