Error in Unity Script Reference web page

Unity Engine
1

on the page Unity - Scripting API: Rigidbody.constraints

The following is incorrect
"By default this is RigidbodyConstraints.FreezeNone, allowing rotation and movement along all axes. "

The Correct Code is RigidbodyConstraints.None

Using FreezeNone will give you a unity bugged error that says you are not pointing to an instance of an object, which will just confuse you. As usual with that general catch all error.

2

You are right. As Unity views documantation errors as bugs, you should fill a bug report. It is unlikely that they will correct it due to a forum post.