Install C++ Redistributables can solve the problem.
Q: When I am creating a layout copy in a WindSim project, I got the following error which preventing me insert new turbine object:
System NullReferenceException message: object reference not set to an instance or an object. trace: at WindSim Controls ObjectPropertyTab SurfacePropertyViewer...
A: Encountering a NullReferenceException error in the Objects module can be resolved by installing the "Microsoft Visual C++ Redistributable for Visual Studio 2015, 2017, and 2019 (x64)" available here. This installation may resolve the error and allow you to insert new turbine objects without issues.