diff --git a/services/tenant-ui/frontend/src/helpers/index.ts b/services/tenant-ui/frontend/src/helpers/index.ts
index 7f0c6fde0..cf83c170b 100644
--- a/services/tenant-ui/frontend/src/helpers/index.ts
+++ b/services/tenant-ui/frontend/src/helpers/index.ts
@@ -21,7 +21,7 @@ function i18n2DateLocale(i18nLocale: I18nLocale): Locale {
 }
 
 function _dateFnsFormat(value: string, formatter: string) {
-  const locale: any = i18n.global.locale;
+  const locale: any = i18n.global?.locale || '';
   const formatted = '';
   try {
     if (value) {
diff --git a/services/tenant-ui/frontend/test/setupGlobalMocks.ts b/services/tenant-ui/frontend/test/setupGlobalMocks.ts
index 6d9db249b..06487d6bc 100644
--- a/services/tenant-ui/frontend/test/setupGlobalMocks.ts
+++ b/services/tenant-ui/frontend/test/setupGlobalMocks.ts
@@ -76,6 +76,7 @@ vi.mock('@/store', () => ({
 }));
 
 vi.mock('vue-i18n', () => ({
+  createI18n: vi.fn(() => ({})),
   useI18n: vi.fn(() => ({
     locale: vi.fn(() => 'en'),
     t: vi.fn((key: string) => key),