diff --git a/api.py b/api.py
index 162a1cd..34b0704 100755
--- a/api.py
+++ b/api.py
@@ -8,7 +8,8 @@ def add(data: LOT_DATA):
         add_kb_to_db(data)
         return BaseResponse()
     except Exception as e:
-        return BaseResponse(code=500, msg=e)
+        print(e)
+        return BaseResponse(code=500, msg=str(e))
 
 
 def delete(start_time, end_time):
@@ -16,7 +17,7 @@ def delete(start_time, end_time):
         delete_kb_detail_by_time(start_time, end_time)
         return BaseResponse()
     except Exception as e:
-        return BaseResponse(code=500, msg=e)
+        return BaseResponse(code=500, msg=str(e))
 
 
 def get_data():
@@ -24,4 +25,4 @@ def get_data():
         data = get_kb_detail()
         return BaseResponse(data=data)
     except Exception as e:
-        return BaseResponse(code=404, msg=e)
+        return BaseResponse(code=404, msg=str(e))