Disqus Not Loading

I’ve followed all the instructions on this page, but I still can’t get Disqus to work. Here’s the plugin debug log:

URL: http://www.zumi.co.ke
PHP Version: 5.6.29
Version: 4.7
Active Theme:
Swill 1.0
URLOpen Method: curl
Plugin Version: 2.86
Settings:
dsq_is_installed: 1\n_disqus_sync_lock: \n_disqus_sync_post_ids: \ndisqus_active: 1\ndisqus_forum_url: zumi-1\ndisqus_api_key: qE4RJEnElygykO9uurc11g8sQ55voD49CvkolkcXxQU0Vz5Pkqs3G4HbxthvGJZL\ndisqus_user_api_key: Wj2hXedI1sMgWNsUMp5WhrKHgNhkWW6eghIhotytTFvx1x6iEchUPLZWzC2e40IE\ndisqus_replace: all\ndisqus_cc_fix: 1\ndsq_external_js: 1\ndisqus_partner_key: \ndisqus_public_key: \ndisqus_secret_key: \ndisqus_sso_button: \ndisqus_manual_sync: \ndisqus_disable_ssr: \ndisqus_last_comment_id: \ndisqus_version: 2.86\n
Plugins:
Ajax Load More 2.13.1 (active)\nAutoptimize 2.1.0 (active)\nDisqus Comment System 2.86 (active)\nExport All URLs 2.3 (active)\nInline Related Posts 2.2.0 (active)\nKraken Image Optimizer 2.6.2 (active)\nOptinMonster API 1.1.6 (active)\nRegenerate Thumbnails 2.2.6 (active)\nSingle Mailchimp 1.4 (active)\nUltimate Posts Widget 2.0.6 (active)\nWordfence Security 6.2.8 \nWordPress Importer 0.6.3 (active)\nWP CSV Exporter 1.1.1 (active)\nWP Missed Schedule 2014.1231.2016.4 (active)\nWP Super Cache 1.4.8 (active)\nYoast SEO 4.0.2 (active)\n