Duo Security - Blank Screen or empty DUO prompt on iOS or macOS

If you are using macOS or iOS devices and blank screen is displayed instead of DUO Prompt choices, it means your Content Restriction is blocked the DUO prompt content.  Disabling content restriction should resolve the issue.

Disabling content restrictions:

iOS 12 or newer:

1. Navigate to Settings > Screen Time > Content & Privacy Restrictions > Content Restrictions > Web Content.
2. Uncheck Limit Adult Websites to completely disable content restrictions.
   • If you do not want to fully disable content restrictions, you can allow duosecurity.com within the Content Restrictions page on the iOS device. This will allow the Duo Prompt to display even if content restrictions are enabled.

macOS 10.15 (Catalina) or higher:

1. Open System Preferences.
2. Navigate to Screen Time > Preferences > Content & Privacy. 
3. Set any Web Content restrictions to Unrestricted access.
   • If you do not want to fully disable content restrictions, you can allow duosecurity.com within the Content Restrictions page on the iOS device or to the Allowed Websites Only list on macOS. This will allow the Duo Prompt to display even if content restrictions are enabled.