I made more experiments and run the same command, but for another not a premium account.
Everything works fine. Surely, I can't create 2nd private application, but I haven't any concerns with the 1st.
What account are you logged into the CLI as? Is it the one associated with this Adobe ID account, or a different one? Feel free to PM it to me if you want to keep it private.
Hi @ryanskihead, I sent you already PM.
Could you please check and let me know if you have any ideas why I can't use premium account?