Hello,

Yes indeed as Amiy mentioned you need to enable SSH password authentication

To do that must login to your server and edit this file:

sudo /etc/ssh/sshd_config

The find this line:

PasswordAuthentication no

And update it to:

PasswordAuthentication yes

After that, you have to restart the SSH service. You can use this command

sudo systemctl restart ssh

Hope that this helps!
Regards,
Bobby