In your xxx.Build.cs, you need to add Paper2D as a dependency.
PublicDependencyModuleNames.AddRange(new string[] { "Core", "CoreUObject", "Engine", "InputCore", "Paper2D" });
In your xxx.Build.cs, you need to add Paper2D as a dependency.
PublicDependencyModuleNames.AddRange(new string[] { "Core", "CoreUObject", "Engine", "InputCore", "Paper2D" });