XML Sitemap Blank

Hi,

My XML Sitemap is not generating anything (comes up with a blank page) and there is nothing in the source code.

I have checked for plugin conflicts as per the yoast knowledge bank (https://kb.yoast.com/kb/my-sitemap-is-blank-what-s-wrong/) and didn’t find anything there either. I do not have any cache plugins installed.

Any further advice please?

The page I need help with: [log in to see the link]