wpdiscuz not appearing

Bought the media-uploader plugin before checking to see if the plugin even worked on my site, and it doesn't. At least not yet. I followed all the troubleshooting steps suggested in this previous forum discussion --

https://gvectors.com/forum/how-to-and-troubleshooting/resolved-wpdiscuz-comment-form-is-missing/#post-349

-- but, alas, I see no sign of wpdiscuz on my posts. I use Elementor, so I was expecting to add a shortcode but I know now your plugin doesn't work that way and I instead made sure "post" was clicked in the wpdiscuz settings, allowed in both Wordpress and individual post settings, and that my Jetpack was deactivated. What now? Your help would be most appreciated, as discussion is crucial for my site.

Thanks,
Alba