[help] not able to import securities in hydra

hi,
in hydra i am not able to import securities. it's my first contact with this program and i think is a great project. Any help, please?
i have tried to import securities with sources: iex and yahoo, but not success.

21:35:46.689| |IEX |Moved into state Stopping.
21:35:46.689|Error |Connector |System.ArgumentNullException: Value cannot be null. (Parameter 'token')
at #=z4LbsmGpm$4fqxSQfVg7okLYyeSCwSXchpg==..ctor(SecureString #=zBS3KVh4=)
at StockSharp.IEX.IEXMessageAdapter.#=z9LplqHQ_aKIn()
at StockSharp.IEX.IEXMessageAdapter.OnSendInMessage(Message message)
at StockSharp.Messages.MessageAdapter.SendInMessage(Message message)
21:35:46.689| |IEX |Moved into state Stopped.
21:37:21.158| |Connector |Connect
21:37:21.158| |Connector |Security @ is subscribing for SecurityLookup,T(L)=2022/11/21 21:37:21.158,Sec=@,TransId=77828250,SecId=@,Name=,SecType=,ExpDate=
21:37:21.158| |Basket |Connecting 'IEX: Key='''.
21:37:21.158|Error |IEX |System.ArgumentNullException: Value cannot be null. (Parameter 'token')
at #=z4LbsmGpm$4fqxSQfVg7okLYyeSCwSXchpg==..ctor(SecureString #=zBS3KVh4=)
at StockSharp.IEX.IEXMessageAdapter.#=z9LplqHQ_aKIn()
at StockSharp.IEX.IEXMessageAdapter.OnSendInMessage(Message message)
at StockSharp.Messages.MessageAdapter.SendInMessage(Message message)
21:37:21.158|Error |Basket |Connection error for IEX: Key='': System.ArgumentNullException: Value cannot be null. (Parameter 'token')
at #=z4LbsmGpm$4fqxSQfVg7okLYyeSCwSXchpg==..ctor(SecureString #=zBS3KVh4=)
at StockSharp.IEX.IEXMessageAdapter.#=z9LplqHQ_aKIn()
at StockSharp.IEX.IEXMessageAdapter.OnSendInMessage(Message message)
at StockSharp.Messages.MessageAdapter.SendInMessage(Message message)
21:37:21.159|Error |Connector |System.ArgumentNullException: Value cannot be null. (Parameter 'token')
at #=z4LbsmGpm$4fqxSQfVg7okLYyeSCwSXchpg==..ctor(SecureString #=zBS3KVh4=)
at StockSharp.IEX.IEXMessageAdapter.#=z9LplqHQ_aKIn()
at StockSharp.IEX.IEXMessageAdapter.OnSendInMessage(Message message)
at StockSharp.Messages.MessageAdapter.SendInMessage(Message message)