diff --git a/web/src/ee/layouts/components/header-enterprise.tsx b/web/src/ee/layouts/components/header-enterprise.tsx
index 6a36f7cb05..0e4142c16a 100644
--- a/web/src/ee/layouts/components/header-enterprise.tsx
+++ b/web/src/ee/layouts/components/header-enterprise.tsx
@@ -1,9 +1,16 @@
 /**
  * Enterprise slots inside the app header. The open-source build renders
  * nothing here; the enterprise build replaces this file with the real
- * billing entries (upgrade badge, support link, current-plan badge).
+ * entries (tenant switcher, upgrade badge, support link, current-plan badge).
  */
 
+export function EnterpriseHeaderTenantSwitcher(_props: {
+  isCompact?: boolean;
+}) {
+  void _props;
+  return null;
+}
+
 export function EnterpriseHeaderUpgradeBadge() {
   return null;
 }
diff --git a/web/src/hooks/use-user-setting-request.tsx b/web/src/hooks/use-user-setting-request.tsx
index aa52785d25..879b5bfc86 100644
--- a/web/src/hooks/use-user-setting-request.tsx
+++ b/web/src/hooks/use-user-setting-request.tsx
@@ -216,6 +216,20 @@ export const useSaveSetting = (silent = false) => {
   return { data, loading, saveSetting: mutateAsync };
 };
 
+// The version endpoint returns either a bare string or `{ version: string }`
+// depending on the backend implementation. Normalize both so the sidebar
+// never attempts to render an object as a React child.
+const normalizeSystemVersion = (payload: unknown): string => {
+  if (typeof payload === 'string') {
+    return payload;
+  }
+  if (payload && typeof payload === 'object' && 'version' in payload) {
+    const { version } = payload as { version?: unknown };
+    return typeof version === 'string' ? version : '';
+  }
+  return '';
+};
+
 export const useFetchSystemVersion = () => {
   const [version, setVersion] = useState('');
   const [loading, setLoading] = useState(false);
@@ -225,7 +239,7 @@ export const useFetchSystemVersion = () => {
       setLoading(true);
       const { data } = await userService.getSystemVersion();
       if (data.code === 0) {
-        setVersion(data.data.version);
+        setVersion(normalizeSystemVersion(data.data));
         setLoading(false);
       }
     } catch (error) {
diff --git a/web/src/layouts/components/header.tsx b/web/src/layouts/components/header.tsx
index cdea671b14..39e328f0a2 100644
--- a/web/src/layouts/components/header.tsx
+++ b/web/src/layouts/components/header.tsx
@@ -9,6 +9,7 @@ import {
 } from '@/components/ui/dropdown-menu';
 import {
   EnterpriseHeaderPlanBadge,
+  EnterpriseHeaderTenantSwitcher,
   EnterpriseHeaderTicketsLink,
   EnterpriseHeaderUpgradeBadge,
 } from '@/ee/layouts/components/header-enterprise';
@@ -87,6 +88,7 @@ export function Header({
             >
               <img src={'/logo.svg'} alt="RAGFlow logo" className="size-10" />
             </Link>
+            <EnterpriseHeaderTenantSwitcher isCompact={isCompact} />
             <EnterpriseHeaderUpgradeBadge />
           </div>
         </div>