Problem

On your environment, when searching for a user by executing an AAD SmartObject, you may encounter the following error:

Could not load file or assembly 'System.Net.Http, Version=4.2.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.

Additional errors:

64005 Failed to resolve '[UserName]': Could not load file or assembly 'System.Net.Http, Version=4.2.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified..

Solution

Make sure that your environment has the latest .NET framework software installed according to the Automation On Prem version you have installed: https://help.nintex.com/en-US/platform/K2Support/ProductCompatibilityMatrix.htm

If you are running for example, Windows Server 2016, installing .NET 4.8 might resolve your issue.