Setting a nickname in the form of personal messages.

[User2]

Hello.
I don't understand how to send a private message.
First, I click Personal Message (screenshot 1). Then the form opens, but for some reason the To field is empty (screenshot 2).
Do I need to manually enter it here or what do I need to do?
As I imagine. After clicking the button (screenshot 1), a form should open in which the user's nickname should be in the To field.

[User2]

Figured out how to do it. The topic can be deleted. For some reason, it didn't work out for the first time, but now I tried it - it worked.