Hi
(I don't know why it doesnt works with secure connection https://www.[redacted].com/sitemap-4seo.xml)
It works perfectly under https (just look up the page source code):
Simply text is "white on white" and you can't see it, and the reason is because the stylesheet is blocked.
And the reason it is blocked is because it's loaded from the http address:
it's not secure to load an http file from an https page, so your browser is blocking it.
And the reason 4SEO is using the HTTP address instead of the proper, https one, is because that's what you have selected as your website address in 4SEO settings (Pages | Settings | Website home address).
So the first thing to do is fix the website home address, then go to Sitemaps | Rebuild Now and reload the sitemap in your browser (you may have to wait a few minutes before it's actually rebuilt).
So... the problem could be, the empty dates rows, the 0000-00-00 rows, or the "good rows" if the month is not in the right position.
The only invalid dates are the 000... ones. The first URL I can see with this problem is:
http://www.[redacted].com/entrevistas/2107-lisa-lutoff-perlo-la-nueva-organizacion-en-europa-es-una-gran-oportunidad-para-celebrity-cruises
So I'd suggest you:
- go and check all the settings for this item, including whether it has valid creation/modification recorded
- tell me what kind of content that is? a regular Joomla article? something else? [EDIT]: this is a K2 article, right?
Best regards
Yannick Gaultier
weeblr.com / @weeblr