When checking the WordPress Toolkit interface, no update is recommended for older installations. When running the Check Update task, it reports all are up to date without error.
We have had user reports of some installations not showing any available updates despite being on older versions of WordPress.
We have reported this incident to the Plesk WordPress Toolkit Developers for further review. Follow this article to receive an email notification when any updates or solutions are added to this article.
Update the installation to the latest version through the WordPress Admin backend.