Ela conhece is not correct? Why?
Ela conhece may need an object to make a complete sentence while Ela sabe does not.
should we report it?
Should be correct.
what's the difference between sabe and conhece?
As far as I know "conhecer" has a narrower meaning and can be translated as "to be (become) acquainted with / to (get to) know" - applying to people or places.
I thought conhecer and saber both mean to know