望楼主解答，万分感激，按照JQData的规则输入主力合约代码：IC9999.CCFX ,均报错如图所示

vnpy2.0.7报错：ModuleNotFoundError: No module named 'vnpy.trader.engine'，大家知道是什么原因吗

Traceback (most recent call last):
File "C:\vnstudio\lib\site-packages\vnpy\app\cta_backtester\engine.py", line 69, in init_rqdata
result = mddata_client.init()
File "C:\vnstudio\lib\site-packages\vnpy\trader\mddata\rqdata.py", line 54, in init
('rqdatad-pro.ricequant.com', 16011))
File "C:\vnstudio\lib\site-packages\rqdatac\client.py", line 166, in init
quota = get_client().execute("user.get_quota")
File "C:\vnstudio\lib\site-packages\rqdatac\decorators.py", line 59, in wrap
return func(args, **kwargs)
File "C:\vnstudio\lib\site-packages\rqdatac\thread_local.py", line 43, in execute
return self._execute(self._get_connection(), method, args, kwargs)
File "C:\vnstudio\lib\site-packages\rqdatac\thread_local.py", line 39, in _execute
raise e
File "C:\vnstudio\lib\site-packages\rqdatac\thread_local.py", line 34, in _execute
return conn.execute(method, args, **kwargs)
File "rqdatac\connection.py", line 120, in rqdatac.connection.Connection.execute
File "rqdatac\connection.py", line 90, in rqdatac.connection.Connection._read_one_packet
rqdatac.share.errors.QuotaExceeded: quota exceeded

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "C:\vnstudio\lib\site-packages\vnpy\trader\ui\mainwindow.py", line 278, in open_widget
widget = widget_class(self.main_engine, self.event_engine)
File "C:\vnstudio\lib\site-packages\vnpy\app\cta_backtester\ui\widget.py", line 49, in init
self.backtester_engine.init_engine()
File "C:\vnstudio\lib\site-packages\vnpy\app\cta_backtester\engine.py", line 62, in init_engine
self.init_rqdata()
File "C:\vnstudio\lib\site-packages\vnpy\app\cta_backtester\engine.py", line 74, in init_rqdata
self.write_log(f"{md_data_api}初始化异常{e.args}")
UnboundLocalError: local variable 'md_data_api' referenced before assignment

@tonywang_efun 老师您好，报这个错，您知道是怎么回事儿吗？望回答，万分感激

1.9.2有TradeCopy模块是一个非常实用的模块，晓优老师有2.0移植过来的打算吗？