You May Not Reassign Notification Because Reassign Has Been Disabled

One of my friend getting error while reassign notification mailer to another user.

"You May Not Reassign Notification Because Reassign Has Been Disabled"

Oracle : 12.1.2

Cause: it is due to a BUG.

Solution: Apply the password protect patch #11672027

Metalink ID: ID 1323579.1]