Sitemap cannot be read
sitemap.unreadable
What it means
A sitemap answered with status 200 but is not a valid urlset or sitemap index (broken XML, wrong format, or larger than 50 MB).
Priority
P2
How to fix it
Run a free check of your page. The report shows the evidence for this finding on your site and a ready-to-paste fix: a robots.txt change, a Cloudflare rule, JSON-LD markup, an llms.txt draft or a short instruction.
How to confirm the fix
After the change, press "Check again" on the report: it lists what was fixed and how the score changed.