Cannot ssh between 2 droplets nor to localhost

I have public keys setup for droplet creation and i am able to remote into both droplets from my computer using the key pair but if I try to ssh from Droplet 1 to Droplet 2 it fails with the following info:

Apr 23 15:03:21 18 sshd[18270]: Connection closed by authenticating user root port 38042 [preauth] Permission denied (publickey).

This happens on both droplets and even when connecting to localhost on the same Droplet.

UFW is disabled and sshd_config is set to the default that DO sets it to when it creates a droplet with a key file.

I have dug through everything i can find but i cannot get past this error.

Both droplets are using ubuntu 18.04

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This means that the server you are connecting to only accepts SSH key login, and the public key for your SSH key pair does not exist in /root/.ssh/authorized_keys no that other server. If going from Droplet1 to Droplet2, then Droplet2 needs to have the public key from Droplet1 in it’s authorized_keys file. The same goes for the other way around. Here you can find some documentation on creating SSH key pairs: