Help simply selecting anything to begin

Hi everyone,

Only just starting my first scrape so rather new here, but can't actually get the select tool to be able to select anything at all from the below site:

Looking at any other site, it seems fairly intuitive, but sods law, the one I need I can't figure out at all.

Looking through the rest of the Devtools, it looks as though there is some issue preventing the sitemap from even connecting, but I am definitely no good at reading or understanding what this issue is, let alone how to fix it:

Any help on how to start would be greatly appreciated!