we have to wait till all nobtcoin network update with new node IP to stake working.
config file for Win user C:\Users\name\AppData\Roaming\NOBTCOIN\nobtcoin.conf ,just change second node IP.
rpcuser=rpc_user
rpcpassword=user passwrd
rpcallowip=127.0.0.1
rpcport=12476
listen=1
server=1
addnode=185.145.253.31
addnode=163.172.173.103 <--
config file for Linux user /root or home/.nobtcoin/nobtcoin.conf , no need to change any thing,
daemon=1
server=1
listen=1
rpcallowip=127.0.0.1
rpcport=12476
rpcuser=usernobtrpc
rpcpassword=password
If you have any problem,stop your nobtcoin wallet/node create new dir e.g nobtcoin1 ,download nobtcoin secure in this dir and rebuild your wallet/node start nobtcoin service -> nobtcoin1/src/./nobtcoind -daemon.