Sitemap not getting fetched on Search Console.

Can you try removing those and re-attempting to add them? Your sitemap looks like it's loading correctly at my end

I've removed it. Can you suggest me the URL I need to use? Because I've tried multiple times submitting it.

The URL you have above is correct – https://deeeen.xyz/sitemap.xml should work. Unfortunately without access to Google's systems it's hard to work out exactly what's going on. Here are a few potential issues which I've confirmed do not affect your sitemap:

• there are no invalid XML characters in the file
• the XML is well formed and validates
• Blot's server returns 200 OK, and sends the correct headers

I'm not sure what is going on at Google's end, I'm afraid – Blot seems to be doing everything right

It still says "couldn't fetch".

EDIT: Worked. I tried forward slash at the end, that worked.

Great, sounds like perhaps a caching issue at Google's end