1) include the raw response from nud
2) add some troubleshooting questions :
nubot and nud on same machine?
wallet unlocked (NBT) ?
does your conf looks exactly like this (port numbers apart) ?
server=1 rpcuser= choose-a-username> rpcpassword= choose-a-password> port=9090 rpcport=9091
is nud nud synced?
does nud hold the private key of BBZ4h88BwYCyE9q268LoArps6eodq9PDGH?
is BBZ4h88BwYCyE9q268LoArps6eodq9PDGH a custodian address?
is your rpcuser/passphrase somewhat complicated? try to set it to something very simple, alphanumeric short, and try again
try removing daemon = 1