How to make newsletter

Your software
My Mautic version is: v3.2.5
My PHP version is: php7.4
My Database type and version is: mysqlnd 7.4.12

Your problem
My problem is: I can make newsletter - like in topic.

Steps I have tried to fix the problem:

I follow:

but i didn’t have send button and i can’t add segment to email channel:

and this topic is old and doesn’t have answer:

I have solution… you have to choose: