@Navin_Rao bro, looking at the errors in this screenshot, I guess, these are randomly created by your theme or any plugin, I mean, tags like “featured”, “popular”, “random”, etc. These pages are generated and they are broken now.
I would suggest you to de-index “/page” and remove the ‘/uncategorized’ from search engines now, that might help to reduce a bit. You can do this via Yoast SEO bro.
Highly recommend you to install “Broken Link Checker” plugin and fix all the other internal broken links as well, try to reduce this 6k count and we shall work on removing the rest bro.