You have two programs that are trying to use the same port. You can't do that. One of your bitcoind instances will need to use a different rpcport (-rpcport) and normal p2p port (-port)
The bitcoin.conf was setup already. As below:
regtest = 1
server = 1
port=18443
connect = 12.0.0.111:18332
rpcuser=bitcoinrpc
rpcpassword=password
The port is set to 18443. Why is that bitcoind trying to bind to port 18332 ?
"2018-03-15 01:31:32 Binding RPC on address ::1 port 18332 failed.
2018-03-15 01:31:32 Binding RPC on address 127.0.0.1 port 18332 failed."