Why can I not write any comment in facebook?

[Edward]

I got onto the facebook page of Katie Ledecky.
I was gonna write a comment on her recent news and photo.
I saw 6 comments, but I couldn't find any space to write my comment on.

How come it happened?
I clicked on "Like", so I thought it would work.
What happened that I cannot write any comment on her page?

[Stacey]

The particular server you are operating on may be currently down. Go into your browsers history and delete all of it's contents. Also clear your Cookie cache and then get back on Facebook and you will be in business!