The WP Debugging plugin must have a wp-config.php file that is writable by the filesystem.

https://pmc-online.org/wp-sitemap-posts-page-1.xmlhttps://pmc-online.org/wp-sitemap-posts-tribe_venue-1.xmlhttps://pmc-online.org/wp-sitemap-posts-tribe_events-1.xmlhttps://pmc-online.org/wp-sitemap-posts-ppec-products-1.xmlhttps://pmc-online.org/wp-sitemap-taxonomies-tribe_events_cat-1.xmlhttps://pmc-online.org/wp-sitemap-users-1.xml