It’s probably a good idea to let people know to update the NuGet packages while building from source.
I’ve been debugging for an entire day not realizing that msbuild just won’t accept Unreal Engine 5.6.1’s default Magick .NET library because of security vulnerabilities.
If you’re having issues with Automation errors or warnings, this is what is causing it. Use Visual Studio Code to Manage NuGet packages and update the Magick .NET libraries for all Automations.
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.