If your settings are set to Partially Open, there are Members you need to approve to allow access to the platform.
To approve a new Member in your Organization, select Memberships from the panel on the left hand side.
Show Pending Memberships
Click the Pending checkbox if it is not already selected. Here you will see a list of all accounts that are pending your approval to join the Organization.
Approve Pending Member
To approve a Member, select Approve under Actions. Learn how to deactivate a Member here.