Hello,
We apologize for the issue you are facing with the ‘Keep your content fresh’ error. Since you mentioned that your sitemap is working well and is regularly updated in Google Search Console, there are a few steps you can take to troubleshoot this issue further:
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Flush the Cache: Since you are using the LiteSpeed Cache plugin, ensure that you flush the cache. You can do this by navigating to the LiteSpeed Cache settings and clearing the cache.
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Exclude Sitemap from Caching: Make sure that your sitemap is excluded from being cached. You can refer to our guide on excluding sitemaps from caching for detailed instructions.
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Check for Plugin Conflicts: Sometimes, other plugins may conflict with your caching plugin. You can use the Health Check plugin to identify any potential conflicts.
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Verify Sitemap URL: Ensure that you are submitting the correct sitemap URL to Google Search Console. It should be in the format `https://rankmath.com/wp-content/uploads/2023/01/increase-links-per-sitemap-1.jpg.
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Check Robots.txt: Ensure that your robots.txt file is not blocking access to your sitemap or any important pages. You can check this in the Rank Math settings under Rank Math SEO → General Settings → robots.txt.
If these steps do not resolve the issue, please reply to this ticket with your site URL and any additional details, and a human agent from our support team will assist you further.
Thank you for raising this concern, and we look forward to helping you resolve it!
Sources:
Rank Math Sitemap Issues and Their Fixes » Rank Math
How to Fix "Incorrect HTTP Header Content-Type" Error in Sitemaps » Rank Math
Please check with the Support team. These steps have been completed, but the same error persists. Rank Math should provide the necessary header code to fix this issue.
Hello,
In this case, head over to Rank Math > Status & Tools > Database Tools > and click the Clear SEO Analysis and Remove Transients buttons to flush the SEO Analysis cache

Clear your website and any server-level caching on your site before doing the Sitewide analysis again.
Looking forward to helping you.
Hello,
Since you’re using the latest posts as your homepage, the og:updated_time tag will not be added to it, as the page is being generated dynamically and doesn’t have a last modified time saved in the database. However, the sitemap includes the Last-Modified time for your homepage.
We have asked the developers to check why the SEO Analyzer isn’t recognizing the Last Modified time in the sitemap and showing the error. You can ignore the test, as the correct modified information is being added in the sitemap and Google will see it and crawl the page for the fresh content.
Please do not hesitate to let us know if you need our assistance with anything else.
Hello,
Glad that helped.
Please feel free to reach out to us again in case you need any other assistance.
We are here to help.
Thank you.