Blank Sitemap – Lost

I cannot get the xml sitemaps to work.

I do not have a cache plugin installed that would interfere. I have disabled and re-enabled all plugins with no change. I’ve also updated WP permalinks to the post-type and nothing has changed.

I’m running a modified version of a bootstrap wordpress theme that I have customized.
The site is https://andonmobile.com/

Any help would be appreciated. I’ve searched and tried most suggestions out there and nothing is working.

https://www.ads-software.com/plugins/wordpress-seo/