Edit: tl;dr remove all blocked domains to be able to see posts / comments with no domain (like this one)
Oop, that issue specifically is definitely this https://codeberg.org/Kbin/kbin-core/issues/1019. I posted it in this thread more details but, I imagine you might not be able to see any of my comments in this thread. If you do see this post, definitely check out https://kbin.social/m/kbinMeta/t/361909 (while logged out because you also won't be able to see that thread logged in)
Check if your issue is https://codeberg.org/Kbin/kbin-core/issues/1019
the last few posts to this magazine have all been people saying they can't view posts / comments when logged in but can when logged out (which you might not be able to see of course if it is this issue, as they were all posts and not links). Try removing all blocked domains to see if you can see them again.
Edit: To be clear, this is to fix being able to see the posts after the error, not fixing the error. My current working theory is: