Blank duo box

When you go to login and reach the DUO page on an iOS or Mac OS device, there is only a blank box, and automatic pushes are not sent. Other browsers/incognito may also not be working.

• iOS/macOS
• DUO
• CAS

Please check the following settings: 

• Make sure that JavaScript is enabled in Safari on the macOS or iOS device. 
• If there is an MDM on the device, such as JAMF, please check to determine if the MDM settings could be preventing the Duo Prompt from displaying. 
• Disable content restrictions on the device. The instructions are described below for different versions of iOS or macOS:

1. • 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.
          
          
          

   • iOS 11 or older:

     1. Go to Settings > General > Restrictions > Websites.
     2. Uncheck Limit Adult Content to completely disable content restrictions
        
        
        
        

   • macOS 10.15 (Catalina) - 12 (Monterey):

     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.
   • macOS 13 (Ventura)
     1. Open System Settings
     2. Navigate to Screen Time > Content & Privacy > Content Restrictions
     3. Set Access to Web Content to Unrestricted access.
        • If you do not want to fully disable content restrictions, you can allow duosecurity.com within the Content Restrictions page by clicking Customize. This will allow the Duo Prompt to display even if content restrictions are enabled.
          
          

DUO Reference Link: Duo Prompt display issues related to iOS or macOS content restrictions

Some iOS or macOS devices have configurable content restrictions that can potentially prevent the Duo Prompt from displaying correctly. This issue can also be caused by JavaScript being disabled in the Safari browser settings, or by having content restrictions in an MDM on the device.

You will be prompted to "Send a push" or "Enter a passcode" by DUO.