Started from wpDiscuz 7 you can attach an image to comments and replies. All settings can be found and managed in the Dashboard > wpDiscuz > Settings > Comment Content and Media admin page.

Important: the default "Attach an image" button is only available for the post, pages, and attachments post types, and for default Wordpress user roles. For custom post types and custom user roles, the button is not accessible. For more advanced features, we recommend to check out the wpDiscuz Media Uploader add-on.

If the "Attach an image" button doesn't work follow the instruction below:

Your website URL is wrongly configured with http:// unsecure protocol. This should be changed to https:// , because you're currently using https:// in website:

Please edit the wp-config.php file of your WordPress and change the URLs from unsecure http:// protocol to https:// protocol.

Here are the incorrect lines in your wp-config.php file:

This will fix all your future problems. This is not only the wpDiscuz issue, you'll always have lots of problems with all plugins that work on AJAX.