diff --git a/packages/wyatt_bloc_layout/example/lib/components/theme_components.dart b/packages/wyatt_bloc_layout/example/lib/components/theme_components.dart
index 2c57df62..2357586c 100644
--- a/packages/wyatt_bloc_layout/example/lib/components/theme_components.dart
+++ b/packages/wyatt_bloc_layout/example/lib/components/theme_components.dart
@@ -18,7 +18,7 @@ class CustomAppBar extends AppBarComponent {
       );
 
   @override
-  AppBarComponent configure(
+  AppBarComponent? configure(
           {String? title, Widget? leading, List<Widget>? actions}) =>
       CustomAppBar(
         title: title ?? this.title,
@@ -44,7 +44,7 @@ class CustomBottomBar extends BottomNavigationBarComponent {
       );
 
   @override
-  BottomNavigationBarComponent configure(
+  BottomNavigationBarComponent? configure(
           {void Function(BuildContext p1, int p2)? onTap,
           int currentIndex = 0}) =>
       this;
@@ -58,7 +58,7 @@ class CustomLoadingWidget extends LoadingWidgetComponent {
       Center(child: CircularProgressIndicator(color: color));
 
   @override
-  LoadingWidgetComponent configure({Color? color}) => CustomLoadingWidget(
+  LoadingWidgetComponent? configure({Color? color}) => CustomLoadingWidget(
         color: color ?? this.color,
       );
 }
@@ -73,7 +73,7 @@ class CustomErrorWidget extends ErrorWidgetComponent {
       );
 
   @override
-  ErrorWidgetComponent configure({String? error}) => CustomErrorWidget(
+  ErrorWidgetComponent? configure({String? error}) => CustomErrorWidget(
         error: error ?? this.error,
       );
 }
diff --git a/packages/wyatt_bloc_layout/lib/src/presentation/consumers/crud_cubit_consumer_screen_bases.dart b/packages/wyatt_bloc_layout/lib/src/presentation/consumers/crud_cubit_consumer_screen_bases.dart
index 7090ff17..e3f58686 100644
--- a/packages/wyatt_bloc_layout/lib/src/presentation/consumers/crud_cubit_consumer_screen_bases.dart
+++ b/packages/wyatt_bloc_layout/lib/src/presentation/consumers/crud_cubit_consumer_screen_bases.dart
@@ -27,10 +27,11 @@ abstract class CrudCubitConsumerScreenBase<
   const CrudCubitConsumerScreenBase({super.key});
 
   Widget errorBuilder(BuildContext context, CrudError state) =>
-      context.components.errorWidget.configure(error: state.message);
+      context.components.errorWidget?.configure(error: state.message) ??
+      const SizedBox.shrink();
 
   Widget loadingBuilder(BuildContext context, CrudLoading state) =>
-      context.components.loadingWidget;
+      context.components.loadingWidget ?? const SizedBox.shrink();
 
   Widget initialBuilder(BuildContext context, CrudInitial state) =>
       const SizedBox.shrink();
diff --git a/packages/wyatt_bloc_layout/lib/src/presentation/screens/crud_cubit_screen_base.dart b/packages/wyatt_bloc_layout/lib/src/presentation/screens/crud_cubit_screen_base.dart
index 4240f819..04f35bbf 100644
--- a/packages/wyatt_bloc_layout/lib/src/presentation/screens/crud_cubit_screen_base.dart
+++ b/packages/wyatt_bloc_layout/lib/src/presentation/screens/crud_cubit_screen_base.dart
@@ -16,17 +16,17 @@
 
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart' as bloc_base;
-import 'package:wyatt_bloc_helper/wyatt_bloc_helper.dart';
 import 'package:wyatt_bloc_layout/wyatt_bloc_layout.dart';
 
 abstract class CrudCubitScreenBase<Cubit extends bloc_base.Cubit<CrudState>,
     SuccessState extends CrudSuccess> extends CubitScreen<Cubit, CrudState> {
   const CrudCubitScreenBase();
   Widget errorBuilder(BuildContext context, CrudError state) =>
-      context.components.errorWidget;
+      context.components.errorWidget?.configure(error: state.message) ??
+      const SizedBox.shrink();
 
   Widget loadingBuilder(BuildContext context, CrudLoading state) =>
-      context.components.loadingWidget;
+      context.components.loadingWidget ?? const SizedBox.shrink();
 
   Widget initialBuilder(BuildContext context, CrudInitial state) =>
       const SizedBox.shrink();
diff --git a/packages/wyatt_ui_components/example/lib/components/custom_app_bar.dart b/packages/wyatt_ui_components/example/lib/components/custom_app_bar.dart
index 384fdf8e..80b9b396 100644
--- a/packages/wyatt_ui_components/example/lib/components/custom_app_bar.dart
+++ b/packages/wyatt_ui_components/example/lib/components/custom_app_bar.dart
@@ -10,7 +10,7 @@ class CustomAppBar extends AppBarComponent {
       );
 
   @override
-  AppBarComponent configure(
+  AppBarComponent? configure(
           {String? title, Widget? leading, List<Widget>? actions}) =>
       CustomAppBar(
         title: title ?? this.title,
diff --git a/packages/wyatt_ui_components/example/lib/components/custom_bottom_bar.dart b/packages/wyatt_ui_components/example/lib/components/custom_bottom_bar.dart
index d3c13033..42eacfab 100644
--- a/packages/wyatt_ui_components/example/lib/components/custom_bottom_bar.dart
+++ b/packages/wyatt_ui_components/example/lib/components/custom_bottom_bar.dart
@@ -29,7 +29,7 @@ class CustomBottomNavigationBar extends BottomNavigationBarComponent {
       );
 
   @override
-  CustomBottomNavigationBar configure({
+  CustomBottomNavigationBar? configure({
     void Function(BuildContext, int)? onTap,
     int currentIndex = 0,
   }) =>
diff --git a/packages/wyatt_ui_components/example/lib/components/custom_error_widget.dart b/packages/wyatt_ui_components/example/lib/components/custom_error_widget.dart
index 8b2a9b5a..736ae98a 100644
--- a/packages/wyatt_ui_components/example/lib/components/custom_error_widget.dart
+++ b/packages/wyatt_ui_components/example/lib/components/custom_error_widget.dart
@@ -11,6 +11,6 @@ class CustomErrorWidget extends ErrorWidgetComponent {
       );
 
   @override
-  ErrorWidgetComponent configure({String? error}) =>
+  ErrorWidgetComponent? configure({String? error}) =>
       CustomErrorWidget(error: error ?? this.error);
 }
diff --git a/packages/wyatt_ui_components/example/lib/components/custom_loading_widget.dart b/packages/wyatt_ui_components/example/lib/components/custom_loading_widget.dart
index 912312fe..6d28e690 100644
--- a/packages/wyatt_ui_components/example/lib/components/custom_loading_widget.dart
+++ b/packages/wyatt_ui_components/example/lib/components/custom_loading_widget.dart
@@ -12,7 +12,7 @@ class CustomLoadingWidget extends LoadingWidgetComponent {
       );
 
   @override
-  CustomLoadingWidget configure({Color? color}) => CustomLoadingWidget(
+  CustomLoadingWidget? configure({Color? color}) => CustomLoadingWidget(
         color: color ?? this.color,
       );
 }
diff --git a/packages/wyatt_ui_components/example/lib/main.dart b/packages/wyatt_ui_components/example/lib/main.dart
index 673d614a..1587122a 100644
--- a/packages/wyatt_ui_components/example/lib/main.dart
+++ b/packages/wyatt_ui_components/example/lib/main.dart
@@ -50,20 +50,23 @@ class Home extends StatelessWidget {
   Widget build(BuildContext context) => Scaffold(
         appBar: PreferredSize(
           preferredSize: const Size.fromHeight(60),
-          child: context.components.appBar.configure(title: 'Example title'),
+          child: context.components.appBar?.configure(title: 'Example title') ??
+              const SizedBox.shrink(),
         ),
         body: Column(
           children: [
             Expanded(
               child: context.components.errorWidget
-                  .configure(error: 'Example erreur'),
+                      ?.configure(error: 'Example erreur') ??
+                  const SizedBox.shrink(),
             ),
             const SizedBox(
               height: 10,
             ),
             Expanded(
               child: context.components.loadingWidget
-                  .configure(color: Colors.green),
+                      ?.configure(color: Colors.green) ??
+                  const SizedBox.shrink(),
             ),
           ],
         ),
diff --git a/packages/wyatt_ui_components/lib/src/domain/entities/component.dart b/packages/wyatt_ui_components/lib/src/domain/entities/component.dart
index ca2d18dc..7a03682f 100644
--- a/packages/wyatt_ui_components/lib/src/domain/entities/component.dart
+++ b/packages/wyatt_ui_components/lib/src/domain/entities/component.dart
@@ -19,5 +19,5 @@ import 'package:flutter/material.dart';
 abstract class Component extends StatelessWidget {
   const Component({super.key});
 
-  Component configure();
+  Component? configure();
 }
diff --git a/packages/wyatt_ui_components/lib/src/domain/entities/components.dart b/packages/wyatt_ui_components/lib/src/domain/entities/components.dart
index a758ae6b..44c16697 100644
--- a/packages/wyatt_ui_components/lib/src/domain/entities/components.dart
+++ b/packages/wyatt_ui_components/lib/src/domain/entities/components.dart
@@ -29,7 +29,7 @@ abstract class AppBarComponent extends Component {
   });
 
   @override
-  AppBarComponent configure({
+  AppBarComponent? configure({
     String? title,
     Widget? leading,
     List<Widget>? actions,
@@ -46,7 +46,7 @@ abstract class BottomNavigationBarComponent extends Component {
   });
 
   @override
-  BottomNavigationBarComponent configure({
+  BottomNavigationBarComponent? configure({
     void Function(BuildContext, int)? onTap,
     int currentIndex = 0,
   });
@@ -57,7 +57,7 @@ abstract class ErrorWidgetComponent extends Component {
   const ErrorWidgetComponent({required this.error, super.key});
 
   @override
-  ErrorWidgetComponent configure({String? error});
+  ErrorWidgetComponent? configure({String? error});
 }
 
 abstract class LoadingWidgetComponent extends Component {
@@ -65,5 +65,5 @@ abstract class LoadingWidgetComponent extends Component {
   const LoadingWidgetComponent({required this.color, super.key});
 
   @override
-  LoadingWidgetComponent configure({Color? color});
+  LoadingWidgetComponent? configure({Color? color});
 }
diff --git a/packages/wyatt_ui_components/lib/src/features/component_theme_data.dart b/packages/wyatt_ui_components/lib/src/features/component_theme_data.dart
index 66540540..e613e826 100644
--- a/packages/wyatt_ui_components/lib/src/features/component_theme_data.dart
+++ b/packages/wyatt_ui_components/lib/src/features/component_theme_data.dart
@@ -17,15 +17,15 @@
 import 'package:wyatt_ui_components/src/domain/entities/components.dart';
 
 class ComponentThemeData {
-  final AppBarComponent appBar;
-  final BottomNavigationBarComponent bottomNavigationBar;
-  final ErrorWidgetComponent errorWidget;
-  final LoadingWidgetComponent loadingWidget;
+  final AppBarComponent? appBar;
+  final BottomNavigationBarComponent? bottomNavigationBar;
+  final ErrorWidgetComponent? errorWidget;
+  final LoadingWidgetComponent? loadingWidget;
 
   const ComponentThemeData.raw({
-    required this.appBar,
-    required this.bottomNavigationBar,
-    required this.errorWidget,
-    required this.loadingWidget,
+    this.appBar,
+    this.bottomNavigationBar,
+    this.errorWidget,
+    this.loadingWidget,
   });
 }
diff --git a/packages/wyatt_ui_layout/example/lib/components/custom_app_bar.dart b/packages/wyatt_ui_layout/example/lib/components/custom_app_bar.dart
index d025a569..d31297fa 100644
--- a/packages/wyatt_ui_layout/example/lib/components/custom_app_bar.dart
+++ b/packages/wyatt_ui_layout/example/lib/components/custom_app_bar.dart
@@ -13,7 +13,7 @@ class CustomAppBar extends AppBarComponent {
       );
 
   @override
-  AppBarComponent configure({
+  AppBarComponent? configure({
     String? title,
     Widget? leading,
     List<Widget>? actions,
diff --git a/packages/wyatt_ui_layout/example/lib/components/custom_bottom_navigation_bar.dart b/packages/wyatt_ui_layout/example/lib/components/custom_bottom_navigation_bar.dart
index d3c13033..42eacfab 100644
--- a/packages/wyatt_ui_layout/example/lib/components/custom_bottom_navigation_bar.dart
+++ b/packages/wyatt_ui_layout/example/lib/components/custom_bottom_navigation_bar.dart
@@ -29,7 +29,7 @@ class CustomBottomNavigationBar extends BottomNavigationBarComponent {
       );
 
   @override
-  CustomBottomNavigationBar configure({
+  CustomBottomNavigationBar? configure({
     void Function(BuildContext, int)? onTap,
     int currentIndex = 0,
   }) =>
diff --git a/packages/wyatt_ui_layout/lib/src/presentation/layouts/app_bar_layout.dart b/packages/wyatt_ui_layout/lib/src/presentation/layouts/app_bar_layout.dart
index 9d392e1e..1bf8f571 100644
--- a/packages/wyatt_ui_layout/lib/src/presentation/layouts/app_bar_layout.dart
+++ b/packages/wyatt_ui_layout/lib/src/presentation/layouts/app_bar_layout.dart
@@ -31,7 +31,8 @@ class AppBarLayout extends Layout {
   Widget build(BuildContext context) => Scaffold(
         appBar: PreferredSize(
           preferredSize: const Size.fromHeight(60),
-          child: context.components.appBar.configure(title: title),
+          child: context.components.appBar?.configure(title: title) ??
+              const SizedBox.shrink(),
         ),
         body: body,
       );
diff --git a/packages/wyatt_ui_layout/lib/src/presentation/layouts/bottom_navigation_bar_layout.dart b/packages/wyatt_ui_layout/lib/src/presentation/layouts/bottom_navigation_bar_layout.dart
index 5c214ef9..58ee146f 100644
--- a/packages/wyatt_ui_layout/lib/src/presentation/layouts/bottom_navigation_bar_layout.dart
+++ b/packages/wyatt_ui_layout/lib/src/presentation/layouts/bottom_navigation_bar_layout.dart
@@ -14,7 +14,7 @@ class BottomNavigationBarLayout extends Layout {
   @override
   Widget build(BuildContext context) => Scaffold(
         body: body,
-        bottomNavigationBar: context.components.bottomNavigationBar.configure(
+        bottomNavigationBar: context.components.bottomNavigationBar?.configure(
           currentIndex: currentIndex,
         ),
       );
diff --git a/packages/wyatt_ui_layout/lib/src/presentation/layouts/frame_layout.dart b/packages/wyatt_ui_layout/lib/src/presentation/layouts/frame_layout.dart
index f32b869f..355716d3 100644
--- a/packages/wyatt_ui_layout/lib/src/presentation/layouts/frame_layout.dart
+++ b/packages/wyatt_ui_layout/lib/src/presentation/layouts/frame_layout.dart
@@ -34,10 +34,11 @@ class FrameLayout extends Layout {
   Widget build(BuildContext context) => Scaffold(
         appBar: PreferredSize(
           preferredSize: const Size.fromHeight(60),
-          child: context.components.appBar.configure(title: title),
+          child: context.components.appBar?.configure(title: title) ??
+              const SizedBox.shrink(),
         ),
         body: body,
-        bottomNavigationBar: context.components.bottomNavigationBar.configure(
+        bottomNavigationBar: context.components.bottomNavigationBar?.configure(
           currentIndex: currentIndex,
         ),
       );