I recently installed and ran the plugin to create a sitemap. /sitemap_index.xml works fine but there are some errors in Google Webmaster Tools I'm trying to resolve.
It says I have 4 sitemaps that are getting 404s...they're all custom stuff from either the theme I'm using (called Avada) or from a plugin called Edit Flow. They are faq_category-sitemap.xml, /pec_events_category-sitemap.xml, /portfolio_category-sitemap.xml, and /post_status-sitemap.xml. I've tried excluding them in the XML settings but they are still showing up in webmaster tools.
I'm getting 6 counts of this error: An invalid date was found. Please fix the date or formatting before resubmitting.
It says the lastmod values for these 6 occurrences have a date of 1969...not sure where in the sitemap those instances are, or how to fix them.
Any ideas? Thanks for taking the time to read this!