An invalid date was found. Please fix the date or formatting before resubmitting.

If a page is selected as a homepage or blog page in the sitemap file, the 'lastmod' attribute for these pages becomes empty, displaying only '()'.

@RavanH plz check it.

[RavanH]

Hi @amirshnll thanks for reporting. Could you tell me what you have selected as Server on Settings > XML Sitemap?

[RavanH]

And what other plugins and theme you are running? I'm unable to replicate the issue with a clean setup...

Hi @amirshnll thanks for reporting. Could you tell me what you have selected as Server on Settings > XML Sitemap?

Server type value is 'WordPress' but if you change to 'plugin' i has not this problem

And what other plugins and theme you are running? I'm unable to replicate the issue with a clean setup...

I used the 'Writing Theme' and disabled all active plugins.

[RavanH]

What is the "Writing Theme"? Can I get it somewhere to test with?

What is the "Writing Theme"? Can I get it somewhere to test with?

I feel it's not related to the themes. Please navigate to the reading settings and set both the homepage and the blog page to display two pages. This method can be used to replicate the bug.

[RavanH]

Well, that is (obviously) the first thing I did when trying to replicate the issue. But like I said, I'm not seeing the same result. You can see on https://dev.status301.com/wp-sitemap-posts-page-1.xml that both the (static) front page and the blog page have a valid lastmod...

So if you have more information about your particular WP installation or server setup that could help replicate the issue, please let me know :)

[RavanH]

What is your server PHP version? Do you see any related errors in your server error log file?

What is your server PHP version? Do you see any related errors in your server error log file?

my wordpress version is latest but my php version is 7.4

[RavanH]

Hi, yes tested on PHP 7.4 too but still not seeing the issue. Sorry... Could it be that you do not have any published posts on your site? Only then could an empty lastmod appear for the blog page...

[RavanH]

The thing is: the plugin uses WordPress core functions like get_lastpostdate and get_lastpostmodified to get these dates.

These functions typically only return a false value if there are no published posts at all.

Looking at your index /wp-sitemap.xml I notice there are pages, portfolio and product sitemaps, but no sitemap for posts. Did you deactivate the posts sitemap or does your site not have regular posts? Is your blog page configured to show another post type than classic posts?

We have installed an additional WordPress for our blog posts, and this website does not have any posts.

[RavanH]

OK, so that explains the missing lastmod on your blog page. But what's the point of configuring a blog page on a WordPress installation that has no posts?

I notice your /blog/ page redirects to another site. It's probably a bad idea to feed search engines URLs that are not real resources but redirects instead. If you wish to include the posts site in your main sitemap index, you can use the Custom URLs field or even the Additional Sitemaps field.

OK, so that explains the missing lastmod on your blog page. But what's the point of configuring a blog page on a WordPress installation that has no posts?

I notice your /blog/ page redirects to another site. It's probably a bad idea to feed search engines URLs that are not real resources but redirects instead. If you wish to include the posts site in your main sitemap index, you can use the Custom URLs field or even the Additional Sitemaps field.

I am experiencing issues with the homepage in the pages' sitemap