If anyone ends up on this page because of this error all you have to do is open the automation project via visual studio at Engine\Source\Programs\AutomationTool\Gauntlet\Gauntlet.Automation.csproj and then use the NuGet package system to update it. You don’t need to build it to do this or generate/save the sln file. This is for the Error: appError called: Assertion failed: (!FPlatformProcess::SupportsMultithreading()) || (!bIsRunning error or the Magick.net warningaserror issue.