Can not log in to SSH (SSH keys are not working?)

Get this error when I try to look at my server.

debug1: Trying private key: C:\Users\admin/.ssh/id_dsa
debug3: no such identity: C:\Users\admin/.ssh/id_dsa: No such file or directory
debug1: Trying private key: C:\Users\admin/.ssh/id_ecdsa
debug3: no such identity: C:\Users\admin/.ssh/id_ecdsa: No such file or directory
debug1: Trying private key: C:\Users\admin/.ssh/id_ed25519
debug3: no such identity: C:\Users\admin/.ssh/id_ed25519: No such file or directory
debug1: Trying private key: C:\Users\admin/.ssh/id_xmss
debug3: no such identity: C:\Users\admin/.ssh/id_xmss: No such file or directory
debug2: we did not send a packet, disable method
debug3: authmethod_lookup keyboard-interactive
debug3: remaining preferred: password 
debug3: authmethod_is_enabled keyboard-interactive
debug1: Next authentication method: keyboard-interactive
debug2: userauth_kbdint
debug3: send packet: type 50
debug2: we sent a keyboard-interactive packet, wait for reply
debug3: receive packet: type 60 
debug2: input_userauth_info_req 
debug2: input_userauth_info_req: num_prompts 1
debug3: failed to open file:C:/dev/tty error:3
debug1: read_passphrase: can't open /dev/tty: No such file or directory
Password for root@******.com:

I tried manually inserting keys and editing the sshd_config file to enable root login and pub key authentication.

My operating system is Ubuntu 16.