Please help, google keeps on saying that it cannot fetch my sitemap. Here are a couple notes on my setup

1. I am using Vercel, i have other projects with Vercel that are indexed without a problem

2. I checked the SSL cert to make sure it is valid

3. I curled the endpoint https://www.algoviz.xyz/sitemap.xml , ensured that it does not redirect and as proper response header of application/xml

4. I have a https://www.algoviz.xyz/robots.txt that includes the sitemap.xml

What could the problem be?