How do I fix the Unapproved Collaborator issue flagged by security dashboard?

This issue is fired whenever an unapproved collaborator is found in the "collaborator" section. By default, all collaborators are unapproved in security dashboard (formerly known as Flusk) and you have to approve them manually one by one in your security dashboard in order to keep track of them.

In order to fix this issue, approve this collaborator manually by clicking "Approve collaborator".