The thing is that https://saham.news/sitemap-news.xml is XML. At least from where I am seeing it. Check the source with Ctrl+u (in most browsers) and you can see that it looks like the source code of https://www.xml-sitemaps.com/sitemap_news.xml, not at all that of https://www.xml-sitemaps.com/sitemap.html
Or use the online validator https://www.xml-sitemaps.com/validate-xml-sitemap.html to check your sitemaps. It will tell you it’s all good.
The only explanation I can think of it that Google is seeing something else. In your first post you wrote it’s getting a “General HTTP error: HTTP 403 error (Forbidden)” response. This looks like something is blocking (forbidding) access from search engines.
You can use the Fetch as Google tool in your Google Search Console account to see what Google sees.