XML Sitemap Generator for WordPress 5xx errors

Hello,

I have 3 pages that have soft 404 errors according to your sitemap. (Sitemap Generator for WordPress 4.1.1)

https://www.interactiongreen.com/archive-3-11-tohoku-earthquake/
https://www.interactiongreen.com/home-2/zero/volume-1-2/zero-intro/chapter-4-abundance-by-absence/chapter-4-3-absence-on-senses/
https://www.interactiongreen.com/home-2/zero/volume-1-2/zero-intro/chapter-4-abundance-by-absence/chapter-4-9-creativity-needs-absence/`

They are referred to pages that I have no idea how it happened. It’s not because I set redirects. For example, the first pages are referred to

https://www.interactiongreen.com/category/zero-news/page/2/
https://www.interactiongreen.com/category/house-vision/

How can I fix them? I am okay deleting these pages as long as it doesn’t affect SEO. Please let me know what the best ways to eliminate 404 errors. Thanks!

The page I need help with: [log in to see the link]