这个bug到底有没有人解决啊？

from tqsdk import TqApi, TqSim, TqBacktest, TqAuth
import datetime

api = TqApi(TqSim(), backtest=TqBacktest(start_dt=datetime.date(2019, 9, 20), end_dt=datetime.date(2020, 9, 1)),web_gui=True, auth=TqAuth("***", "***"))
api.get_quote("DCE.m2009")

以上是代码（隐去了账户密码）

问题是从十月3号或4号某个时间开始的，之前一直正常。试过了大部分2020年9，10月份的合约都有类似问题

以下是报错

runfile('E:/TQ_final/problem.py', wdir='E:/TQ_final')
在使用天勤量化之前，默认您已经知晓并同意以下免责条款，如果不同意请立即停止使用：https://www.shinnytech.com/blog/disclaimer/
INFO - 您可以访问 http://127.0.0.1:50872 查看策略绘制出的 K 线图形。
Traceback (most recent call last):
File "E:\Anaconda3\lib\site-packages\IPython\core\interactiveshell.py", line 3296, in run_code
exec(code_obj, self.user_global_ns, self.user_ns)
File "<ipython-input-2-938996f8327a>", line 1, in <module>
runfile('E:/TQ_final/problem.py', wdir='E:/TQ_final')
File "E:\PyCharm Community Edition 2019.2.2\helpers\pydev\_pydev_bundle\pydev_umd.py", line 197, in runfile
pydev_imports.execfile(filename, global_vars, local_vars) # execute the script
File "E:\PyCharm Community Edition 2019.2.2\helpers\pydev\_pydev_imps\_pydev_execfile.py", line 18, in execfile
exec(compile(contents+"\n", file, 'exec'), glob, loc)
File "E:/TQ_final/problem.py", line 5, in <module>
api.get_quote("DCE.m2009")
File "E:\Anaconda3\lib\site-packages\tqsdk\api.py", line 378, in get_quote
self._ensure_symbol(symbol)
File "E:\Anaconda3\lib\site-packages\tqsdk\api.py", line 407, in _ensure_symbol
if not self.wait_update(deadline=deadline):
File "E:\Anaconda3\lib\site-packages\tqsdk\api.py", line 1219, in wait_update
self._run_once()
File "E:\Anaconda3\lib\site-packages\tqsdk\api.py", line 2203, in _run_once
raise self._exceptions.pop(0)
File "E:\Anaconda3\lib\site-packages\tqsdk\api.py", line 1883, in _md_handler
raise Exception(f"查询合约服务报错 {query_result['error']}")
Exception: 查询合约服务报错 failed to execute graphql operation, errors: [instrumentId: DCE.m2009 dose not exist]