dealt with problem of Play as client mode

Source/TurnBasedTutorial/MainMenuPlayerController.cpp

@@ -0,0 +1,13 @@
+// Fill out your copyright notice in the Description page of Project Settings.
+
+
+#include "MainMenuPlayerController.h"
+#include "Blueprint/UserWidget.h"
+
+void AMainMenuPlayerController::BeginPlay() {
+    Super::BeginPlay();
+    SetShowMouseCursor(true);
+    UUserWidget *CreatedWidget = CreateWidget<UUserWidget>(
+        GetWorld(), WidgetClass);
+    CreatedWidget->AddToViewport();
+}

Source/TurnBasedTutorial/MainMenuPlayerController.h

@@ -0,0 +1,22 @@
+// Fill out your copyright notice in the Description page of Project Settings.
+
+#pragma once
+
+#include "CoreMinimal.h"
+#include "GameFramework/PlayerController.h"
+#include "MainMenuPlayerController.generated.h"
+
+/**
+ * 
+ */
+UCLASS()
+class TURNBASEDTUTORIAL_API
+    AMainMenuPlayerController : public APlayerController {
+    GENERATED_BODY()
+
+    virtual void BeginPlay() override;
+
+protected:
+    UPROPERTY(EditAnywhere)
+    TSubclassOf<UUserWidget> WidgetClass;
+};

Source/TurnBasedTutorial/MyPlayerController.cpp

@@ -5,6 +5,7 @@
 #include "MyGameMode.h"
 #include "MyGameState.h"
 #include "MyPlayerState.h"
+#include "Blueprint/UserWidget.h"
 #include "Net/UnrealNetwork.h"
 
 AMyPlayerController::AMyPlayerController()
@@ -13,6 +14,13 @@ AMyPlayerController::AMyPlayerController()
     SetShowMouseCursor(true);
 }
 
+void AMyPlayerController::BeginPlay() {
+    Super::BeginPlay();
+    UUserWidget *CreatedWidget = CreateWidget<UUserWidget>(
+        GetWorld(), WidgetClass);
+    CreatedWidget->AddToViewport();
+}
+
 void AMyPlayerController::SetupInputComponent() {
     Super::SetupInputComponent();
     InputComponent->BindAction("MyAction", IE_Pressed, this,
@@ -129,7 +137,7 @@ void AMyPlayerController::EndTurn_Implementation() {
 
 void AMyPlayerController::SetPlayerIndex(uint8 NewPlayerIndex) {
     PlayerIndex = NewPlayerIndex;
-    
+
     GetMyPlayerState()->SetPlayerIndex(NewPlayerIndex);
     // GetMyPlayerState()->PlayerIndex = NewPlayerIndex;
 }

Source/TurnBasedTutorial/MyPlayerController.h

@@ -12,6 +12,8 @@ class TURNBASEDTUTORIAL_API AMyPlayerController : public APlayerController {
     GENERATED_BODY()
 
 public:
+    virtual void BeginPlay() override;
+    
     // FOnMyTurnChangedDelegate OnMyTurnChanged;
     
     virtual void SetupInputComponent() override;
@@ -49,6 +51,9 @@ public:
     // void SetEnemySelection(const TArray<ATrooper *> &Troopers) const;
     
 private:
+    UPROPERTY(EditAnywhere)
+    TSubclassOf<UUserWidget> WidgetClass;
+    
     // UPROPERTY(Replicated)
     // bool bIsMyTurn;
     //