Hi,
The problem is caused by the missing assets on the blog front-end. I can’t see the plugin stylesheets nor the javascript files loaded. I suspect it might be either:
– because the theme is missing the mandatory wp_head() function call from it’s header.php file. Some very old or custom made themes may have this issue. You will have to check with the theme for that.
– something else is purposfully de-queueing the plugin assets.
The front-end reports that you are using WordPress 2.8.6, is that correct? That is very outdated, unsecure, and over 8 years old release, I very highly recommend updating it to the latest release. Most plugins, including this one, only supports WordPress 4.0 and later. If this is the case, I recommend backing up everything before proceeding to update, as updating from very old versions can be problematic.