Webform Worflow notifaction
Without more information on the issue, there could be a lot of causes for this. For example, most emails are sent when cron runs, is cron set to run periodically? 

Are you able to see your logs on the site? 

If so, are there errors associated with email not being sent (Go to http://your-site-url/#overlay=admin/reports and select recent log messages)? Is your server configured to sent emails? 

Some error logs are found on your /etc/httpd/logs/error_log folder, looking there would be helpful too while you try and submit a form to see what gets logged.

As I mention above, more info perhaps can help us troubleshoot it. 

Hope this helps.