Hi there,
I am currently having same problem where a project does not build due to CEF3Utils having no module rules.
For some reason project built fine but since I have included plugin I have been having this build error.
I assume this means that one of headers I am including from Unreal Engine is including CEF3Utils and WebBrowser somewhere along line.
My plugin type is Runtime and I am including following in my pch.
#include "ModuleManager.h"
#include "LevelEditor.h"
#include "LevelEditorActions.h"
#include "SharedPointer.h"
#include "Internationalization.h"
#include "MultiBoxExtender.h"
#include "Engine.h"
#include "Animation/Skeleton.h"
#include "Animation/SkeletalMeshActor.h"
#include "EditorModes.h"
thanks