Legend , thanks martin :) 

Posted by: @percysgrowroom

After the update, I am not receiving notifications when I receive messages. 

Please make sure, you're using the latest version of PM, we've released a new version for the notification integration. It's integrated with wpForo notification system. So all new PM notifications are included in the Notification Bell, don't search it in previous place.

Posted by: @percysgrowroom

Also, The likes in the notification feels redundant, and I want to stop that notification from showing in the notification bar. Is that possible. 

You should use this code in active theme functions php:

function my_custom_wpforo_notifications_filter( $args ){
    if( !empty($args) ){
          $args = 'new_like';
   }
   return $args;
}
add_filter('wpforo_get_notifications_args', 'my_custom_wpforo_notifications_filter', 10, 1);

How to Easily Add Custom Code in WordPress (without Breaking Your Site)

Also, The likes in the notification feels redundant, and I want to stop that notification from showing in the notification bar. Is that possible. 

Seems like I'm here every day again lol. Just want to get all of these issues sorted an I can leave you alone lol