Unable to connect to the Disqus API servers

When trying to set the plugin up I can’t log in. I enter my username/email and password and get “Unable to connect to the Disqus API servers” error message. I have disabled all the other plugins, uninstalled and reinstalled your plugin, deleted my Disqus account and created a new one, tried the Disqus official plugin, I always receive “Unable to connect to the Disqus API servers” when tryng to configure the plugin. I have already posted in the official Disqus support but maybe you can help me. My site is: http://estamosjugados.co.nf. It’s hosted on biz.nf free host, but I don’t think that is a problem, because all the other plugins works fine. Here I paste the Disqus debug information from the official Disqus plugin:

URL: http://estamosjugados.co.nf
PHP Version: 5.4.37
Version: 4.1.1
Active Theme:
Hemingway 1.47
URLOpen Method: curl
Plugin Version: 2.84
Settings:
dsq_is_installed: _disqus_sync_lock:
_disqus_sync_post_ids:
disqus_active: 0
disqus_forum_url:
disqus_api_key:
disqus_user_api_key:
disqus_replace:
disqus_cc_fix:
dsq_external_js:
disqus_partner_key:
disqus_public_key:
disqus_secret_key:
disqus_sso_button:
disqus_manual_sync:
disqus_disable_ssr:
disqus_last_comment_id:
disqus_version: 2.84

Plugins:
Akismet 3.1.1
Broken Link Checker 1.10.5
Disqus Comment System 2.84 (active)
Hello Dolly 1.6
Wordfence Security 5.3.11
WordPress SEO 2.0.1

https://wordpress.org/plugins/disqus-conditional-load/