Update

app/Http/Middleware/HandleInertiaRequests.php

@@ -47,11 +47,16 @@ public function share(Request $request): array
                 'user' => $request->user(),
                 'user_is_admin' => user_is_master_admin($request->user()),
             ],
-            'ziggy' => fn (): array => [
+            'ziggy' => fn(): array => [
                 ...(new Ziggy)->toArray(),
                 'location' => $request->url(),
             ],
             'sidebarOpen' => ! $request->hasCookie('sidebar_state') || $request->cookie('sidebar_state') === 'true',
+            'flash' => [
+                'message' => fn() => $request->session()->get('message'),
+                'error' => fn() => $request->session()->get('error'),
+                'success' => fn() => $request->session()->get('success'),
+            ],
         ];
     }
 }