I can’t unblock someone on facebook why?

I can’t un block someone on facebook why? There profile wont even show up.
Answer #1
They have probably blocked you, lol
EDIT – we had a similar post here yesterday, and I told that guy sometimes it can take a day or 2 to go through when you unblock someone.
I don’t know why people block then unblock all the time, blocking should be used for like when someone is harrassing or stalking you.
Answer #2
They removed their profile?
Answer #3
I can see them from from other matual friends though just not when you press everyone and they show up
Answer #4
You’ve been blocked by them (or by that person)… so that is why you can’t see them (or that person)… LOL… James STOP STALKING people!