Plugin not working

I have this plugin installed on my site http://rambansal.in
After the installation, the first new post notification was sent to users, but for the second published post today at 10 am, the users have not been notified about the post.

Further, my site has two categories of users – users and site-users, available through my dashboard. I want both classes of users to be notified.

https://wordpress.org/plugins/notify-users-e-mail/