Can’t access posts

I have a main site however, I used mutisites to make separate sections under the main site. One of the sections is not showing up on WordPress (admin). I can see it on my main site, just not on Worpress. I have many posts waiting to be edited and published, but it won’t go to the section. All others sections are accessible. My hosting site was able to see this, but they are unfamiliar with the multisite feature. What they were able to point out was that the section has its own admin login. I sign in and I am able to see all my published and pending posts, but I cannot access them, it redirects to “You attempted to edit an item that doesn’t exist. Perhaps it was deleted?” Is there a fix for this?