sem101 on "[Plugin: The SEO Framework] Sitemap.xml 500 Server Error"

I'm still debugging, but so far I've learned in my Multisite network that these work...

example.com/site2/sitemap.xml
example.com/site3/sitemap.xml
anotherdomain.com/sitemap.xml

But the main site has 500 Server error...

example.com/sitemap.xml