Letsencrypt certbot timeout error [nginx proxy_pass]

I am getting this weird letsencrypt error while trying to run the command

    $ certbot certonly --standalone --email example@gmail.com --agree-tos -n -d trumporate.com,www.trumporate.com
    Saving debug log to /var/log/letsencrypt/letsencrypt.log
    Obtaining a new certificate
    Performing the following challenges:
    tls-sni-01 challenge for trumporate.com
    tls-sni-01 challenge for www.trumporate.com
    Waiting for verification...
    Cleaning up challenges
    Failed authorization procedure. trumporate.com (tls-sni-01): urn:acme:error:connection :: The server could not connect to the client to verify the domain :: Timeout, www.trumporate.com (tls-sni-01): urn:acme:error:connection :: The server could not connect to the client to verify the domain :: Timeout
     - The following errors were reported by the server:
       Domain: trumporate.com
       Type:   connection
       Detail: Timeout
       Domain: www.trumporate.com
       Type:   connection
       Detail: Timeout
       To fix these errors, please make sure that your domain name was
       entered correctly and the DNS A record(s) for that domain
       contain(s) the right IP address. Additionally, please check that
       your computer has a publicly routable IP address and that no
       firewalls are preventing the server from communicating with the
       client. If you're using the webroot plugin, you should also verify
       that you are serving files from the webroot path you provided.

Right now I have generated the file dhparam using

    $ sudo openssl dhparam -out /etc/ssl/certs/dhparam.pem 2048

Here is my current nginx conf file

    $ cat /etc/nginx/sites-available/trumporate 
    server {
        listen 80;
        server_name trumporate.com www.trumporate.com; 
        location / {
            include proxy_params;
    	    proxy_redirect off;

Not sure where am I going wrong. Should trumporate.com be resolvable on this vm where I am running certbot?

stopped nginx and ran it again, gave the same error

I have registered the domain through route53.
It’s got 2 type A records pointing to the elastic IP attached to the ec2 box.
one for the www version and one without it and has 4 NS records and an SOA record which I think were there by default when creating the hosting zone

ubuntu@ip-172-31-22-27:~$ lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 16.04.2 LTS
Release:	16.04
Codename:	xenial
$ nginx -v
nginx version: nginx/1.10.0 (Ubuntu)

It appears that you have managed to obtain a cert for both names: https://crt.sh/?id=166448926

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