K3sup join unable to get token

Hi folks,

after I fixed my ssh problem with k3sup install setting PasswordAthentication on no and PermitRootLogin without-password in the destination node sshd_config I have another similar problem with the k3s join command as it seems.

192.168.10.xx is my master-node 192.168.10.yy the remote host on which I would like to install k3s on.

Trying: k3sup join --ip 192.168.10.59 --user root --server-user root --server-ip 192.168.10.48 --server
I get:

Running: k3sup join
Joining 192.168.10.59 => 192.168.10.48
Error: unable to get join-token from server: Process exited

SSHD_CONFIG is the same as with k3sup install - changing it didnĀ“t solved the problem. So what do I have to change or add to make k3sup join running?

Many thanks in Advance
Uli