NOTE: you must have created an organisation before you add members. Please see the article How do I Create a new Organisation? to create an organisation.
NOTE: this is the same process as manually adding a member. If you aren't sure how to do that, see How do I manually add a member?
To add the member to the organisation you created, click on the magnifying glass next to Organisation.
Click on the link before the organisation you created to select it.
This changes the Organisation to the one you created.
Click Save. The member will be added to your organisation.