[X2Go-User] Can't solve error: "Access denied. Authentication that can continue: publickey, password"

[Franziska Goltz]

Hi,

I am trying to run x2go with a macOS Mojave client and a Ubuntu 18.04 
server. When trying to connect, I keep getting the following error: 
"Access denied. Authentication that can continue: publickey,password". 
It seems like this is an error other people had before, so I tried 
multiple things that were suggested on various feeds, but nothing 
helped. I tried logging in with a different user, changed the user 
passwords, changed the passkey of my private key, I tried all 
combinations of the 
"PasswordAuthentication","ChallengeResponseAuthentication" and 
"PubkeyAuthentication" settings in my sshd_config file. I checked 
whether the correct key is in the authorized_keys file, I checked that 
the .ssh directory and the authorized_key have the correct permissions. 
I restarted multiple times and tried changing the presettings of my 
connection, e.g. I tried not entering the directory for my private key, 
which gives me an additional error saying: "Failed to read private 
key:/Users/Franziska/.ssh/id_rsa". Using a normal OpenSSH client and 
logging on to the server via the command line works fine. I don't really 
know what more to try so I would be very grateful for any kind of help!

Thank you very much in advance!

Kind regards,
Franziska Goltz