Error sitemap.xml with the Google Search Console

[ghost]

Hello,
I want to send my sitemap to Google Search Console but when I send it, I have an error because the sitemap.xml is not valid according to Google. It's not a problem of SEO but validity of sitemap.xml file :

This is the details :

This is the sitemap generated by the theme :
https://nextcloudbox.netlify.app/fr/sitemap.xml
https://nextcloudbox.netlify.app/en/sitemap.xml

[somratpro]

Hello @nextcloudbox

a sitemap is not customizable, because Hugo generates it automatically, I suggest you discuss it on Hugo forum. Thank you