Traceback (most recent call last):
File "C:\vnstudio\lib\site-packages\vnpy_datamanager\ui\widget.py", line 609, in download
count = self.engine.download_bar_data(symbol, exchange, interval, start)
File "C:\vnstudio\lib\site-packages\vnpy_datamanager\engine.py", line 216, in download_bar_data
self.database.save_bar_data(data)
File "C:\vnstudio\lib\site-packages\vnpy_sqlite\sqlite_database.py", line 147, in save_bar_data
bar.datetime = convert_tz(bar.datetime)
File "C:\vnstudio\lib\site-packages\vnpy\trader\database.py", line 20, in convert_tz
dt = dt.astimezone(DB_TZ)
AttributeError: 'time.struct_time' object has no attribute 'astimezone'
