I searched the forum and the responses were for very old versions , but my issue is similar.
The Path to the XML Sitemap I coded to be under the \wp-content\uploads\sitemap.xml
but the URL to the XML Sitemap (which I cannot change is going to another domain for another site on my hosting account.
This file does not have the correct information.
SEO is last on the list to turn on when you are ready to go live; I am now live and SEO is not working--- not the start you want.