Image sitemap shows 404 error. Can't generate Sitemap of Next Gen gallery.

Your https://simolex.com/sitemap_index.xml also gives me a 404.. Could you try this:
https://kb.yoast.com/article/123-xml-sitemap-errors

I’m sorry, I disabled Sitemap functionality for a while that was the reason why you were unable to see sitemap page (https://simolex.com/sitemap_index.xml)

I just enabled it and now you can perform your check, please.

Also, I tried all those solutions provided at https://kb.yoast.com/article/123-xml-sitemap-errors

but no luck.

thanks.

Have you seen these comments on the same issue?
https://www.ads-software.com/support/topic/removing-ngg_tags-from-sitemap-1

I’m just wondering what you are using these ngg_tags for? The tag is most probably not the image galleries itself, but tags added to the images, right?

I’d disable it in WordPress SEO > XML Sitemaps (bottom of page)

Actually, I’m using next gen gallery plugin and I want to submit my sitemap of image galleries to webmaster tools. Some of the page like https://simolex.com/product/d-shape-silicone-rubber-seal/ has more than 25 images on it but yoast’s is not listing them on sitemap (over here: https://simolex.com/product-sitemap.xml). It would be great If I can index all those images to google.

ngg_tags are next gen gallery tags that images use and that’s what I want to list out as a sitemap(images).

Yes, I did see all those comments. Thanks for pointing. But, that guy want to remove his sitemap(which was working in his case) and I want to create one. So, completely reverse situation. ALso, disabling ngg_tag will not show ngg_tag sitemap page, but I want to make it work. I mean, I want ngg_tag sitemap and dont want to remove it.

Thanks.

Are these images in the Edit field of the page (d-shape-silicone-rubber-seal) or inserted via the gallery shortcode? That might be hard to read for our plugin, actually. That means the images are only ‘inserted’ when the page is shown in the browser, not while editing the page.

Could you give me an example of a ngg_tag page you have on your website?

Yes, I inserted them via shortcode.
Unfortunately I’m unable to open any image pages. I dont know how and where to look for it. Is there any other way to index those images in google?

Thanks for your time and responses.

I actually quite like the WordPress gallery
https://codex.www.ads-software.com/The_WordPress_Gallery
combined with a proper light/thickbox plugin for the larger images. Have you tried that? Or does the site have way too many galleries to make that work at this stage..?

Yeah, We will be having like 35 to 50 galleries pretty soon. With 20 to 30 images in each.

By the way, thanks for the suggestion Michiel.

No problem!