Your second nodes (the one you try to add) is not registered in cluster configuration.
Most likely this is because of incorrect IP addresses usage:
you use 127.0.x.x which is internal network and should not be used for anything else.
Please, change IP address for you nodes to something else (192.168.0.x is a very good candidate for this) and then run node addition again.
Make sure you have passwordless connectivity working and all prerequisites met.