Codetree has three different permission levels or roles:

Owners and Admins are Organization-level roles and have full access to all Codetree Projects that are part of the Organization. Owners have access to billing information while Admins do not. Owners and Admins are configured using the Members tab in Organization settings.

Collaborators are tied to individual projects and have full access to issue data that is part of the Project. Regardless of your permission level in Codetree, if you do not have access to the Issue data in GitHub you won’t be able to access the Issues in Codetree. Collaborator access is configured using the Project permissions screen.