bitcoind is running and is synchonized. I am trying to run lightning with the first command and I get this error:

lightningd/lightningd --log-level=debug

    lightningd(3684): Trying to guess public addresses...

    lightningd(3684): Address 192.168.1.12:9735 is not routable

    lightningd(3684): Failed to connect 10 socket: Network is unreachable

My bitcoin.conf file has these lines:

    server=1

    rpcuser=aUser

    rpcpassword=aPassword

Any help would be appreciated.
My computer is behind a router...