diff --git a/server/gameserver/roommgr.cc b/server/gameserver/roommgr.cc
index 0b52e35d..5399b8b5 100644
--- a/server/gameserver/roommgr.cc
+++ b/server/gameserver/roommgr.cc
@@ -921,6 +921,14 @@ void RoomMgr::SendGetCustomBattleData(std::shared_ptr<cs::CMJoin> join_msg,
                           {
                               rsp_obj->ToJsonStr()
                                   });
+                     if (rsp_obj->GetType() != a8::XOT_OBJECT ||
+                         !rsp_obj->HasKey("errcode")) {
+                         cb(1, "", nullptr);
+                         return;
+                     }
+                     int errcode = rsp_obj->Get("errcode", "").GetInt();
+                     std::string errmsg = rsp_obj->Get("errmsg", "").GetString();
+
                      auto custom_battle = std::make_shared<CustomBattle>();
                      if (rsp_obj->GetType() == a8::XOT_OBJECT) {
 #if 0