What triggers this issue?
This issue reports all pages in your sitemap files with the "noindex" directive.
Why is it important?
The sitemap file is devised to point search engines to the pages you want to be crawled and indexed. Having pages with the “noindex” tag defeats the purpose of sitemap and causes confusion for search engines.
This can result in search engines ignoring your sitemaps. In this case, you might end up with some indexability issues on your website.
How to fix it?
You need to make sure that your sitemap doesn’t contain any noindex pages. Check the pages from the report:
Either exclude noindex pages from your sitemap files if they are not intended for search engines or remove the ‘noindex’ directive from the particular page if it was added by mistake.