[ BUG ] Using 'links' option in an entry breaks sitemap generation

Describe the bug When adding the ‘links’ option to a sitemap entry that is already working, it is causing sitemap creation to fail validation. From the ‘Options you can pass’ example:

links: [
    { lang: 'en', url: 'http://test.com/page-1/' },
    { lang: 'ja', url: 'http://test.com/page-1/ja/' }
  ],

Expected behavior I expected the sitemap to add the <xhtml:link xmlns:xhtml="http://www.w3.org/1999/xhtml" rel="alternate" hreflang="en" href="https://url.example" /> entry to the sitemap, which it does. The problem is that the entire sheet fails validation after doing so.

Context:

• Library Version 7.1.1

Additional context I am currently generating the sitemap with the ‘Serve a sitemap from a server and periodically update it’ example from this package.

[duxor]

the same for me…

[thisfiore]

same here, if I add links I don’t get xml anymore but just a string with link sequences without structure