Sitemap not loading - Load error!
Permalink"Failed to load resource: the server responded with a status of 404 ()"
and the link shows
"https://www.brandontennis.org/index.php/ccm/system/page/sitemap_data?displayNodePagination=0&cParentID=0&siteTreeID=0&displaySingleLevel=0&includeSystemPages=0&_=1553791901695"
Through exhaustively searching the Forum for solutions, I did find a reference to this same issue and using the Framework theme on C5 ver 8.3.2 but in a later comment, they said this problem just disappeared and therefore thought it may be a cache issue. I have cleared site cache and browser cache but no improvement.
Does anybody have a clue for me on how to resolve this?

Thanks for taking the time to offer a suggestion though, I DO appreciate any and ALL the help I can get.