The issue you are facing is because you are not able to connect to the fabric network.
Check that you have imported your PeerAdmin card correctly:
composer card list -c PeerAdmin@hlfv1
Then restart the network with the fabric-tools scripts:
./StopFabric.sh
./teardownFabric.sh
Start it again by:
./startFabric.sh
./createPeerAdminCard.sh