not nullable

packages/app/src/components/Me/InAppNotificationSettings.tsx

@@ -31,9 +31,9 @@ const InAppNotificationSettings: FC<Props> = (props: Props) => {
 
   const initializeInAppNotificationSettings = useCallback(async() => {
     const { data } = await appContainer.apiv3Get('/personal-setting/in-app-notification-settings');
-    const retrievedRules: SubscribeRule[] = data?.subscribeRules;
+    const retrievedRules: SubscribeRule[] = data.subscribeRules;
 
-    if (retrievedRules != null && retrievedRules.length > 0) {
+    if (retrievedRules.length > 0) {
       setSubscribeRules(retrievedRules);
     }
     else {