why is pyGithub add_membership throwing an AssertionError?

I am using PyGithub version 2.3.0 and would like to add a team member to a team.

why is pyGithub add_membership throwing an AssertionError?

I am using PyGithub version 2.3.0 and would like to add a team member to a team.

why is pyGithub add_membership throwing an AssertionError?

I am using PyGithub version 2.3.0 and would like to add a team member to a team.