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我的CTA回测模块关闭后重新打开,报了下面这个错误,请问是什么回事?

Traceback (most recent call last):
  File "D:\vnpy\lib\site-packages\vnpy\trader\ui\mainwindow.py", line 276, in open_widget
    widget = widget_class(self.main_engine, self.event_engine)
  File "D:\vnpy\lib\site-packages\vnpy_ctabacktester\ui\widget.py", line 55, in __init__
    self.backtester_engine.init_engine()
  File "D:\vnpy\lib\site-packages\vnpy_ctabacktester\engine.py", line 71, in init_engine
    self.init_datafeed()
  File "D:\vnpy\lib\site-packages\vnpy_ctabacktester\engine.py", line 77, in init_datafeed
    result: bool = self.datafeed.init()
  File "D:\vnpy\lib\site-packages\vnpy_rqdata\rqdata_datafeed.py", line 123, in init
    df: DataFrame = all_instruments()
  File "D:\vnpy\lib\site-packages\rqdatac\decorators.py", line 150, in wrap
    return func(*args, **kwargs)
  File "D:\vnpy\lib\site-packages\rqdatac\services\basic.py", line 384, in all_instruments
    ins_ret = filter(cond, get_instrument_list(market))
  File "D:\vnpy\lib\site-packages\rqdatac\decorators.py", line 129, in wrapper
    value = user_function(*args, **kwargs)
  File "D:\vnpy\lib\site-packages\rqdatac\services\basic.py", line 141, in _all_cached_instruments_list
    return _all_instruments_list(market)
  File "D:\vnpy\lib\site-packages\rqdatac\services\basic.py", line 118, in _all_instruments_list
    ins = [Instrument(i) for i in get_client().execute("all_instruments", market=market)]
  File "D:\vnpy\lib\site-packages\rqdatac\decorators.py", line 67, in wrap
    return func(*args, **kwargs)
  File "D:\vnpy\lib\site-packages\rqdatac\connection_pool.py", line 27, in execute
    return conn.execute(method, *args, **kwargs)
  File "rqdatac\connection.py", line 117, in rqdatac.connection.Connection.execute
  File "rqdatac\connection.py", line 87, in rqdatac.connection.Connection._read_one_packet
rqdatac.share.errors.QuotaExceeded: Quota exceeded
> > > > 1. quote here
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