If your GitHub organization has private repositories, you will need to ensure that the Nightfall Radar application has OAuth access to your GitHub organization. Contact your GitHub admin and follow along with the steps shown at this link before attempting to run another scan: https://docs.github.com/en/free-pro-team@latest/github/setting-up-and-managing-your-github-user-account/requesting-organization-approval-for-oauth-apps
If your scan continues to not complete, your organization may have enforced SAML SSO and you will need to authorize a personal access token for the Nightfall Radar OAuth application. Please follow the steps shown at this link before attempting to run another scan: https://docs.github.com/en/free-pro-team@latest/github/authenticating-to-github/authorizing-a-personal-access-token-for-use-with-saml-single-sign-on
If you have tried the above steps and your scans continue to not complete, contact firstname.lastname@example.org for assistance.