系統windows 7 x86
python 3.8.5 x86
最近用python串接元大oneapi遇到下面的問題

Traceback (most recent call last):
  File "C:\Users\trevor\Desktop\HSUNJEN\YuantaOneOrder.py", line 9, in <module>
    objYuantaOneAPI.Login(System.String('98875005091'), System.String('1234'))
System.NullReferenceException: 並未將物件參考設定為物件的執行個體。
   於 YuantaOneAPI.YuantaOneAPITrader.Login(String Account, String Password)

原始碼：

import clr
import System
path = "c://Yuanta//ONE//YuantaOneAPI.dll"
clr.AddReference(path)

from YuantaOneAPI import YuantaOneAPITrader
objYuantaOneAPI = YuantaOneAPITrader()
objYuantaOneAPI.Open()
objYuantaOneAPI.Login(System.String('98875005091'), System.String('1234'))

HELP資訊：

Help on YuantaOneAPITrader in module YuantaOneAPI object:

class YuantaOneAPITrader(System.Object)
 |  Void .ctor()
 |  
 |  Method resolution order:
 |      YuantaOneAPITrader
 |      System.Object
 |      builtins.object
 |  
 |  Methods defined here:
 |  
 |  __call__(self, /, *args, **kwargs)
 |      Call self as a function.
 |  
 |  __delitem__(self, key, /)
 |      Delete self[key].
 |  
 |  __eq__(self, value, /)
 |      Return self==value.
 |  
 |  __ge__(self, value, /)
 |      Return self>=value.
 |  
 |  __getitem__(self, key, /)
 |      Return self[key].
 |  
 |  __gt__(self, value, /)
 |      Return self>value.
 |  
 |  __hash__(self, /)
 |      Return hash(self).
 |  
 |  __init__(self, /, *args, **kwargs)
 |      Initialize self.  See help(type(self)) for accurate signature.
 |  
 |  __iter__(self, /)
 |      Implement iter(self).
 |  
 |  __le__(self, value, /)
 |      Return self<=value.
 |  
 |  __lt__(self, value, /)
 |      Return self<value.
 |  
 |  __ne__(self, value, /)
 |      Return self!=value.
 |  
 |  __repr__(self, /)
 |      Return repr(self).
 |  
 |  __setitem__(self, key, value, /)
 |      Set self[key] to value.
 |  
 |  __str__(self, /)
 |      Return str(self).
 |  
 |  ----------------------------------------------------------------------
 |  Static methods defined here:
 |  
 |  __new__(*args, **kwargs) from CLR.CLR Metatype
 |      Create and return a new object.  See help(type) for accurate signature.
 |  
 |  ----------------------------------------------------------------------
 |  Data descriptors defined here:
 |  
 |  Close
 |      Void Close()
 |  
 |  Dispose
 |      Void Dispose()
 |  
 |  Finalize
 |      Void Finalize()
 |  
 |  GetQuoteList
 |      Boolean GetQuoteList()
 |  
 |  GetQuoteListDetail
 |      Boolean GetQuoteListDetail()
 |  
 |  LogOut
 |      Boolean LogOut()
 |  
 |  Login
 |      Boolean Login(System.String, System.String)
 |  
 |  OnResponse
 |  
 |  Open
 |      Void Open(YuantaOneAPI.enumEnvironmentMode)
 |  
 |  Overloads
 |  
 |  RQ
 |      Boolean RQ(System.String, YuantaOneAPI.YuantaDataHelper)
 |  
 |  SendFutureOrder
 |      Boolean SendFutureOrder(System.String, System.Collections.Generic.List`1[YuantaOneAPI.FutureOrder], YuantaOneAPI.enumLangType)
 |  
 |  SendOVFutureOrder
 |      Boolean SendOVFutureOrder(System.String, System.Collections.Generic.List`1[YuantaOneAPI.OVFutureOrder], YuantaOneAPI.enumLangType)
 |  
 |  SendStockOrder
 |      Boolean SendStockOrder(System.String, System.Collections.Generic.List`1[YuantaOneAPI.StockOrder], YuantaOneAPI.enumLangType)
 |  
 |  SetLogType
 |      Void SetLogType(YuantaOneAPI.enumLogType)
 |  
 |  ShowPostA
 |      Void ShowPostA(Boolean)
 |  
 |  SubscribeFiveTickA
 |      Boolean SubscribeFiveTickA(System.Collections.Generic.List`1[YuantaOneAPI.FiveTickA], YuantaOneAPI.enumLangType)
 |  
 |  SubscribeFiveTickB
 |      Boolean SubscribeFiveTickB(System.Collections.Generic.List`1[YuantaOneAPI.FiveTickB], YuantaOneAPI.enumLangType)
 |  
 |  SubscribeQuote
 |      Boolean SubscribeQuote(System.String, YuantaOneAPI.YuantaDataHelper)
 |  
 |  SubscribeStockTick
 |      Boolean SubscribeStockTick(System.Collections.Generic.List`1[YuantaOneAPI.StockTick], YuantaOneAPI.enumLangType)
 |  
 |  SubscribeWatchlist
 |      Boolean SubscribeWatchlist(System.Collections.Generic.List`1[YuantaOneAPI.Watchlist], YuantaOneAPI.enumLangType)
 |  
 |  SubscribeWatchlistAll
 |      Boolean SubscribeWatchlistAll(System.Collections.Generic.List`1[YuantaOneAPI.WatchlistAll], YuantaOneAPI.enumLangType)
 |  
 |  UnsubscribeFivetickA
 |      Boolean UnsubscribeFivetickA(System.Collections.Generic.List`1[YuantaOneAPI.FiveTickA], YuantaOneAPI.enumLangType)
 |  
 |  UnsubscribeFivetickB
 |      Boolean UnsubscribeFivetickB(System.Collections.Generic.List`1[YuantaOneAPI.FiveTickB], YuantaOneAPI.enumLangType)
 |  
 |  UnsubscribeQuote
 |      Boolean UnsubscribeQuote(System.String, YuantaOneAPI.YuantaDataHelper)
 |  
 |  UnsubscribeStocktick
 |      Boolean UnsubscribeStocktick(System.Collections.Generic.List`1[YuantaOneAPI.StockTick], YuantaOneAPI.enumLangType)
 |  
 |  UnsubscribeWatchlist
 |      Boolean UnsubscribeWatchlist(System.Collections.Generic.List`1[YuantaOneAPI.Watchlist], YuantaOneAPI.enumLangType)
 |  
 |  UnsubscribeWatchlistAll
 |      Boolean UnsubscribeWatchlistAll(System.Collections.Generic.List`1[YuantaOneAPI.WatchlistAll], YuantaOneAPI.enumLangType)
 |  
 |  __overloads__
 |  
 |  add_OnResponse
 |      Void add_OnResponse(YuantaOneAPI.OnResponseEventHandler)
 |  
 |  remove_OnResponse
 |      Void remove_OnResponse(YuantaOneAPI.OnResponseEventHandler)
 |  
 |  ----------------------------------------------------------------------
 |  Data descriptors inherited from System.Object:
 |  
 |  Equals
 |      Boolean Equals(System.Object)
 |      Boolean Equals(System.Object, System.Object)
 |  
 |  GetHashCode
 |      Int32 GetHashCode()
 |  
 |  GetType
 |      System.Type GetType()
 |  
 |  MemberwiseClone
 |      System.Object MemberwiseClone()
 |  
 |  ReferenceEquals
 |      Boolean ReferenceEquals(System.Object, System.Object)
 |  
 |  ToString
 |      System.String ToString()

API元件：
https://drive.google.com/file/d/1OQXZIZAkwgum2f6QeTJMZluj3IacepoY/view?usp=sharing

希望高手幫幫忙ＸＤ