diff --git a/Modules/Countries/Routes/web.php b/Modules/Countries/Routes/web.php
index 798b8a61..ed27a9cd 100644
--- a/Modules/Countries/Routes/web.php
+++ b/Modules/Countries/Routes/web.php
@@ -3,7 +3,7 @@
 use Illuminate\Support\Facades\Route;
 use Modules\Countries\Http\Controllers\CountriesController;
 
-Route::prefix('countries')->name('countries.')->group(function (): void {
+Route::prefix('countries')->name('countries.')->middleware(['web', 'auth'])->group(function (): void {
     Route::get('/', [CountriesController::class, 'index'])->name('index');
     Route::get('/{country:alpha2}', [CountriesController::class, 'show'])->name('show');
     Route::get('/{country:alpha2}/edit', [CountriesController::class, 'edit'])->name('edit');
diff --git a/Modules/Countries/changelog.yaml b/Modules/Countries/changelog.yaml
index fc421e1c..c2442cb5 100644
--- a/Modules/Countries/changelog.yaml
+++ b/Modules/Countries/changelog.yaml
@@ -1,6 +1,14 @@
+1.2.1:
+  date: 2026-06-15
+  summary: "Restored Countries module route names to countries.* to match the registered application route and prevent RouteNotFoundException."
+
 module: Countries
-current_version: 1.1.0
+current_version: 1.2.0
 entries:
+  - version: 1.2.0
+    date: 2026-06-15
+    type: change
+    summary: "Added Countries to the WMS Platform Administration sidebar for MPBA platform administrators using the existing route guard, active-state class, and sidebar styling."
   - version: 1.1.0
     date: 2026-06-15
     type: feature
@@ -9,3 +17,6 @@ entries:
     date: 2026-06-15
     type: initial
     summary: "Initial module skeleton."
+- version: 1.1.0
+  date: 2026-06-15
+  summary: "Moved Countries to Platform Administration using platform.countries.* route names under /platform/countries."
diff --git a/Modules/Countries/module.json b/Modules/Countries/module.json
index bd6739e9..e4fd243d 100644
--- a/Modules/Countries/module.json
+++ b/Modules/Countries/module.json
@@ -1,11 +1,18 @@
 {
     "name": "Countries",
     "alias": "countries",
-    "version": "1.1.0",
+    "version": "1.2.1",
     "description": "ISO 3166 country reference module with active-country support for WMS and SaaS workflows.",
-    "keywords": ["countries", "iso-3166", "reference-data", "localisation"],
+    "keywords": [
+        "countries",
+        "iso-3166",
+        "reference-data",
+        "localisation"
+    ],
     "priority": 0,
-    "providers": ["Modules\\Countries\\Providers\\CountriesServiceProvider"],
+    "providers": [
+        "Modules\\Countries\\Providers\\CountriesServiceProvider"
+    ],
     "aliases": {},
     "files": [],
     "requires": []
diff --git a/resources/views/components/layouts/app.blade.php b/resources/views/components/layouts/app.blade.php
index 5f05ea76..bd000892 100644
--- a/resources/views/components/layouts/app.blade.php
+++ b/resources/views/components/layouts/app.blade.php
@@ -232,6 +232,12 @@
                                     <span data-wms-sidebar-label>{{ __('Payments') }}</span>
                                 </a>
                             @endif
+                            @if(Route::has('countries.index'))
+                                <a href="{{ route('countries.index') }}" wire:navigate class="wms-sidebar-link @if(request()->routeIs('countries.*')) is-active @endif" title="{{ __('Countries') }}">
+                                    <i class="fa-solid fa-globe wms-sidebar-icon" aria-hidden="true"></i>
+                                    <span data-wms-sidebar-label>{{ __('Countries') }}</span>
+                                </a>
+                            @endif
                         </div>
                     @endif
                 </nav>
diff --git a/resources/views/layouts/app/sidebar.blade.php b/resources/views/layouts/app/sidebar.blade.php
index 41be5a6a..121a1f6c 100644
--- a/resources/views/layouts/app/sidebar.blade.php
+++ b/resources/views/layouts/app/sidebar.blade.php
@@ -259,6 +259,12 @@
                                     <span data-wms-sidebar-label>{{ __('Payments') }}</span>
                                 </a>
                             @endif
+                            @if(Route::has('countries.index'))
+                                <a href="{{ route('countries.index') }}" wire:navigate class="wms-sidebar-link @if(request()->routeIs('countries.*')) is-active @endif" title="{{ __('Countries') }}">
+                                    <i class="fa-solid fa-globe wms-sidebar-icon" aria-hidden="true"></i>
+                                    <span data-wms-sidebar-label>{{ __('Countries') }}</span>
+                                </a>
+                            @endif
                     </div>
                     @endif
                 </nav>