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 here before attempting to run another scan.
SAML SSO Authorization
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 here before attempting to run another scan. Please note that you do not need to actually input the personal access token anywhere in Radar or otherwise connect it with Radar.
After doing so, you will need to re-install the Nightfall app as follows:
In the upper-right corner of any page, click your profile photo, then click Settings.
In the left sidebar, click Applications.
Click the Authorized OAuth Apps tab.
Click the 3 dots next to the Nightfall app and click "Revoke Access"