Solved:
My mistake.
I used successfully coin-wallet-rpc –trusted-daemon argument(connected to an external daemon) but used incorrectly –daemon-login instead of –rpc-login
Reply To: Monero Coin Adapter used with other coin
I reply to all queries on the forums and via email, once per day, Monday to Friday (not weekends).
If you are new here, please see some information on how to ask for support. Thank you!