CertBot Authorisation error

Good Evening,

I’m trying to generate a SSL Certificate using the EFF’s Certbot however, I’m hitting a little snag with the authorisation component.

Instead of the expected response it gets a few strings of HTML. I believe this is because of the testcookie-nginx-module blocking it. I was wondering if there was a way around this, or have I hit a insurmountable obstacle?

Thank you

I quite apologize. I failed to take into account the fact that they changed their name from Let’s Encrypt when I did my forum and that this question had already been answered.
For the sake of ensuring the answer can be found easily for others searching for Certbot, the relivent answer can be found here.
TL DR; It seems like you need a premium account to get it to work.