Trouble editing 2 posts

Hi there,
first of all good morning and thank you for any solution suggested.

I have a problem editing 2 post:
N.1
and
N.2

I edited each post normally, but the crash and WP gives me this warning: “You don’t have permission to access /wp-admin/post”. Maybe someone could keep an eye on the code of those posts.
I don’t know where the problem is.
It’s seems that if I insert spaces or justify, the post cannot work.
It’s strange, only I had these problems with 2 posts…

Sandro