No Sitemap.xml File Generated

I had this plugin on 10 sites. I recently discovered there is no Sitemap.xml on any of them. I tried installing a different plugin and it creates a Sitemap.xml on every one. I’ve tried going back to Google XML Sitemaps because I wanted to use this plugin. Still, no file generated.

My daughter has this plugin on 2 sites (at my recommendation) and it works fine on both. But nothing on mine!?

Is there setting I miss? I install and update a page, but no file … on any of them.