Mattermost unreachable

I'm having this problem

Please check connection, Mattermost unreachable. If issue persists, ask administrator to check WebSocket port.

This is my NGINX File.

server {
listen 80;
server_name xx.xx.com;
return 301 https://xx.xx.com$request_uri;
}
server {
listen 443 ssl spdy;
server_name xx.xx.com;
ssl_certificate /etc/letsencrypt/live/xx.xx.com/fullchain.pem;
ssl_certificate_key /etc/letsencrypt/live/xx.xx.com/privkey.pem;
ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
ssl_ciphers 'ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:ECDHE-RSA-DES-CBC3-SHA:ECDHE-ECDSA-DES-CBC3-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:CAMELLIA:DES-CBC3-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA';
ssl_prefer_server_ciphers on;
location / {
proxy_pass http://xx.xx.com:8065/;
proxy_read_timeout 90;
proxy_redirect http://xx.xx.com:8065/ https://xx.xx.com;
}
}

I also used the NGINX config going off Mattermost install guide. But it kept timing out and when accessing it direct through the IP I had the same message.

Can anyone advise? Everytime you post a message you get the unreachable message.

Thanks.