diff --git a/src/ez_lan_manager/components/UserInfoBox.py b/src/ez_lan_manager/components/UserInfoBox.py
index 4d06522..cddd010 100644
--- a/src/ez_lan_manager/components/UserInfoBox.py
+++ b/src/ez_lan_manager/components/UserInfoBox.py
@@ -73,6 +73,8 @@ class UserInfoBox(Component):
     async def update(self) -> None:
         if not self.user:
             self.user = await self.session[UserService].get_user(self.session[SessionStorage].user_id)
+        if not self.user:
+            return
         self.user_balance = await self.session[AccountingService].get_balance(self.user.user_id)
         self.user_ticket = await self.session[TicketingService].get_user_ticket(self.user.user_id)
         self.user_seat = await self.session[SeatingService].get_user_seat(self.user.user_id)