Got below error when live trade and choose CS as data provider:

Error Message:
Runtime Error: CharlesSchwabBrokerageSymbolMapper.GetLeanSymbol: The security type 'Base' with brokerage symbol 'BRK.B' is not supported. Stack Trace: CharlesSchwabBrokerageSymbolMapper.GetLeanSymbol: The security type 'Base' with brokerage symbol 'BRK.B' is not supported.