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HTTP Error 500.19 - Internal Server Error

Question / Problem

HTTP Error 500.19 - Internal Server Error

Answer / Solution

Possible Reason: ASP.NET 4.7.2 has not been enabled in the 'Windows Features' underneath the 'Internet Information Service (IIS)'. This is an known issue on Windows Server 2012. Please activate ASP.NET 4.7.2 in the 'Windows Features' underneath the entry 'Internet Information Service (IIS)':

  1. Open the Server Manager.
  2. On the dashboard use the entry 'Add Roles And Features'.
  3. Click on 'Server Selection'.
  4. Click on 'Server Roles'.
  5. Navigate to 'Web Server (IIS)' > 'Web Server' > 'Application Development' and activate 'ASP.NET 4.7.2'.
  6. In the next dialog all dependend features will be shown. Press 'Add Features'.
  7. After the installation press the button 'Close' and try to execute the SpaceObServer Web Access in the browser again.