diff --git a/src/server/cache/index.ts b/src/server/cache/index.ts
index cf171bb..7bd6362 100644
--- a/src/server/cache/index.ts
+++ b/src/server/cache/index.ts
@@ -37,7 +37,9 @@ export function buildQueryWithCache<T, Args extends any[]>(
 
     const realValue = await fetchFn(...args);
 
-    await cacheManager.set(key, JSON.stringify(cachedValue));
+    if (realValue) {
+      await cacheManager.set(key, JSON.stringify(realValue));
+    }
 
     return realValue;
   };
diff --git a/src/server/model/feed/event.ts b/src/server/model/feed/event.ts
index f13841c..7e2bf76 100644
--- a/src/server/model/feed/event.ts
+++ b/src/server/model/feed/event.ts
@@ -10,6 +10,7 @@ import { serializeJSON } from '../../utils/json';
 import { buildQueryWithCache } from '../../cache';
 import { sendNotification } from '../notification';
 import { token } from '../notification/token';
+import { logger } from '../../utils/logger';
 
 const { get: getFeedEventNotify, del: delFeedEventNotifyCache } =
   buildQueryWithCache(async (channelId: string) => {
@@ -69,7 +70,9 @@ export async function sendFeedEventsNotify(
 
   await Promise.all(
     notifications.map((notification) =>
-      sendNotification(notification, 'Feed Report', eventTokens)
+      sendNotification(notification, 'Feed Report', eventTokens).catch((err) =>
+        logger.error('[Notification] sendFeedEventsNotify', err)
+      )
     )
   );
 }