Facebook "The page you requested could not be found"

Hello,

So I’ll explain my problem,

I was friends with someone on Facebook, but now I don’t see her in my friends list or among our mutual friends, as if she blocked me... for example, on Google her name shows up but when I click the link it displays "The requested page could not be found" when I’m logged into FB, so when I log out of Facebook and search again on Google there is the link and it shows "No results for your query. Sign up on Facebook or Log In to see all results." Once logged in the same message always appears.
She no longer appears in FB searches either... moreover I know her account is active because I have a friend who has her on FB !!! The weirdest thing is that even by creating another Facebook account it’s impossible to contact her either, still this message "The requested page could not be found" !!!
Another thing is when I’m logged out, her FB link appears on BING; I can see that her account is active, but once connected the same error message !!

So my question is:

Is it possible that by blocking the search for her name this phrase appears ???

But I’m not the only one among her friends that she apparently blocked... so check: for me she must have blocked several people and also the search for her name.

Otherwise are there Facebook security apps ??? app center ???

Thanks

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