diff --git a/Yi.Abp.Net8/module/chat-hub/Yi.Framework.ChatHub.Domain/Managers/UserMessageManager.cs b/Yi.Abp.Net8/module/chat-hub/Yi.Framework.ChatHub.Domain/Managers/UserMessageManager.cs
index 06d2a9ad..7bfc47dd 100644
--- a/Yi.Abp.Net8/module/chat-hub/Yi.Framework.ChatHub.Domain/Managers/UserMessageManager.cs
+++ b/Yi.Abp.Net8/module/chat-hub/Yi.Framework.ChatHub.Domain/Managers/UserMessageManager.cs
@@ -78,7 +78,12 @@ namespace Yi.Framework.ChatHub.Domain.Managers
         public async Task<ChatOnlineUserCacheItem?> GetUserAsync(Guid userId)
         {
             var key = new ChatOnlineUserCacheKey(CacheKeyPrefix);
-            var cacheUser = System.Text.Json.JsonSerializer.Deserialize<ChatOnlineUserCacheItem>(await RedisClient.HGetAsync(key.GetKey(), key.GetField(userId)));
+           var cacheUserOrNull= await RedisClient.HGetAsync(key.GetKey(), key.GetField(userId));
+           if (cacheUserOrNull is null)
+           {
+               return null;
+           }
+            var cacheUser = System.Text.Json.JsonSerializer.Deserialize<ChatOnlineUserCacheItem>(cacheUserOrNull);
             return cacheUser;
         }
     }
diff --git a/Yi.Abp.Net8/src/Yi.Abp.Web/YiAbpWebModule.cs b/Yi.Abp.Net8/src/Yi.Abp.Web/YiAbpWebModule.cs
index b7ad52ec..a643c514 100644
--- a/Yi.Abp.Net8/src/Yi.Abp.Web/YiAbpWebModule.cs
+++ b/Yi.Abp.Net8/src/Yi.Abp.Web/YiAbpWebModule.cs
@@ -76,8 +76,8 @@ namespace Yi.Abp.Web
             {
                 //默认关闭，开启会有大量的审计日志
                 optios.IsEnabled = true;
-                //审计日志过滤器
-                optios.AlwaysLogSelectors.Add(x => Task.FromResult(!x.Url.StartsWith("/api/app/file/")));
+                //审计日志过滤器，符合条件的才记录
+                optios.AlwaysLogSelectors.Add(x => Task.FromResult(x.Url is null?true:!x.Url.StartsWith("/api/app/file/")));
             });
 
             //采用furion格式的规范化api，默认不开启，使用abp优雅的方式