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Could not load type 'System.ServiceModel.Activation.HttpModule' from assembly 'System.ServiceModel, Version=3.0.0.0 …

Question / Problem

Could not load type 'System.ServiceModel.Activation.HttpModule' from assembly 'System.ServiceModel, Version=3.0.0.0 …

Answer / Solution

Possible Reason: ASP.NET 4.0 is installed, but not registered.

  1. Open the windows command line.
  2. Go to 'C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319\' and execute the following command: aspnet_regiis.exe –iru