提示错误如下：
Traceback (most recent call last):
File "c:\vnstudio\lib\site-packages\vnpy\trader\ui\widget.py", line 571, in connect
self.main_engine.connect(setting, self.gateway_name)
File "c:\vnstudio\lib\site-packages\vnpy\trader\engine.py", line 166, in connect
gateway.connect(setting)
File "c:\vnstudio\lib\site-packages\vnpy\gateway\futu\futu_gateway.py", line 128, in connect
self.thread.start()
File "c:\vnstudio\lib\threading.py", line 843, in start
raise RuntimeError("threads can only be started once")
RuntimeError: threads can only be started once
但是左下角的日志提示连上了
