page blank show if we open sitemap url

Hello,

I have downloaded Rankmath and have tried using the sitemaps feature it provides. However, when checking the sitemaps pages I keep seeing a blank/empty page. I already read https://rankmath.com/kb/check-plugin-conflicts/ and have tried it. Even with all plugin and theme disabled and having only Rank math enabled, the sitemaps pages remain blank. The post says it would come from my wordpress setup but I can’t find how to fix the issue, could you help me with this problem?