Disqus appears on some articles but not on others. Even I disabled all plugins (with and without Disqus Conditional Load), the comment section wont show up. Please investigate this. This isnt the disqus totally. The theme may not compatible with disqus. When I disabled the disqus, the default wordpress not showing too.
Does this theme support this?
This will render the Disqus scripts as external files in the footer as recommended by WordPress. Disable this if are not seeing Disqus appear on pages that normally have comments. This will fix the issue if your theme does not support the ‘wp_enqueue_script’ function, are caching your site on a CDN.