Google can't fetch my sitemap – https://ademi.fit/sitemap.xml

No feedback provided, just can't fetch. I played with Claude Fable for 5 hours to search the problem. It brute-forced all possible problems that ever existed, but no solution was provided. How can I get an answer from google support about this case?

May be anyone here knows the answer? Didn't use the stackoverflow for a long time, hope mega brain guys are still here