I can't add members to a team

I using “Rocket Saas trial”.
I created a chanel, there’re 3 member in the chanel.
I created a team with 2 member. Then I want to add the last member to the team but It seems that there is no the feature, is there?
I find the helps at https://docs.rocket.chat/guides/user-guides/rooms/teams/teams-members. But there is no button like that in my screen.
Please help me in this case.
Thank you

Hi there,
is anyone here?