Digital Ocean Floating IP

1

Hey guys,

Following this tutorial trying to install the SSL onto a Droplet - https://www.digitalocean.com/community/tutorials/how-to-secure-nginx-with-let-s-encrypt-on-ubuntu-14-04

I am also using a floating IP.

I am getting the following error:
Error parsing key authorization file: Invalid key

Any ideas what the issue could be?

Thanks,
Kam