Last seen Invalid date (gateway)

Hi Every one

I am trying to communicate LoraServer over windows 7 with a gateway.

I am trying to connect from my LoraAppServer installation to a Gateway, in my network, and when I try to see the connection with the gateway
I am receiving this message in the gateway details:

And in the cmd, I am seeing the next message

And a few moments after this the message is comming:

Thanks for any advice, for this.

Excuse me my bad english

This has already been asked and will be fixed: