I’m on latest CE19.5 RC1, Odroid N2+, SSH is enabled in CoreElec settings.
Whenever I try to connect via Putty, I get a connection refused error. The IP is correct as I can connect to it via a File Explorer and browse the log files and so on.
Did you enable only allow private key login in CE’s SSH settings? In that case logiing without private key will be refused, and there won’t be interactive password login prompt.