Shamim's Plugins

Is this happening only for one user or for all users?
Can you please check Front End PM PRO > Settings > Security and see if your role has permission to send message to that role user?

are your child theme active?
did you added this code after ?>

I respect all of my customers and try to support in all cases. During purchase you have agreed to our Terms and Conditions where it is clearly written what is covered by the support. After that also i write code most of the time for customers. But that has some limitation.

As you are overriding templates in your child theme, you can easily add h2 tags in those templates. Eg. in directory.php add <h2>Member Directory</h2> just after ?> in line 16

Which version you are using? Some of the string i do not find. Eg. “Message Box”, “Announcements” etc which you want in h2 tag.

Most string change you will find in templates, So as you are overriding templates in your child theme, you can simply change there.

Sample code:
Add following code in your child theme’s functions.php. This will change message title placeholder

add_filter( 'fep_form_fields', function( $fields ){
    $fields['message_title']['placeholder'] = 'ENter a subject here';
    return $fields;
});

And i charge 50$ per hour.

You can create your own tag to send attachment status with email. Instruction in https://sp-test1.arogga.co/docs/front-end-pm-pro/customization-front-end-pm-pro/add-own-email-tag/

Not possible.

for messages, add following code in your theme’s (child theme’s if any) functions.php

add_action( 'fep_display_before_messagebox', function(){
	?><script type="text/javascript">
	jQuery(document).ready(function($){
		var delay = (function(){
		  var timer = 0;
		  return function(callback, ms){
		    clearTimeout (timer);
		    timer = setTimeout(callback, ms);
		  };
		})();

		$('.fep-messagebox-search-form-field').keyup(function() {
			delay(function(){
		      $('#fep-messagebox-search-form').submit();
		  }, 1000 );
		});
	});
	</script><?php
});

In child theme only /templates folder can be modified.
To modify CSS, just add modified CSS in your child theme’s style.css file. OR add your modified CSS in Front End PM PRO > Settings > General > Custom CSS