AX 2012 Help Server error: Could not load type ‘System.ServiceModel
.Activation.HttpModule’ from assembly ‘System.ServiceModel, Version=, Culture=neutral, PublicKeyToken=b77a5c561934e089’


To resolve this issue, run the following command line: 

aspnet_regiis.exe /iru
The Aspnet_regiis.exe file can be found in one of the following locations:
%windir%Microsoft.NETFramework64v4.0.30319 (on a 64-bit computer)


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