In order to fix this problem, please follow the instruction below:
- Check the plugin settings /wp-admin/admin.php?page=updater-pro-options;
- The plugin sends email notifications if any updates are available.
- Some email messages can be marked as spam on the server. Enter email address (Sender's name and email address), for example, gmail account or similar. If the message is approved (sent), this means that the email filtering is configured on your server.
- Are you getting any notifications about new users registration? If no, perhaps you didn't configure email sending. In this case You need to install an extra plugin called SMTP by BestWebSoft, and then configure it accordingly.