Invalid Sitemap URL in Robots.txt
What This Means
The robots.txt file references a sitemap URL that returns an error or is not accessible. This means search engines cannot find your sitemap through the robots.txt declaration.
What Triggers This Issue
This issue is triggered when a Sitemap directive in robots.txt points to a URL that returns a 4xx or 5xx status code, or is otherwise inaccessible.
How To Fix
Update the Sitemap directive in robots.txt to point to a valid, accessible sitemap URL. Ensure the sitemap exists at the specified location and returns a 200 OK status.
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