Do you have any custom code for this plugin?
Did you add that user as whitelisted in Front End PM PRO > Settings > Security?

1. All users of client roles can view directory & add announcements?
2. Please send me capabilities of client role.

Please let me know following

1. All users of client roles can view directory & add announcements?
2. Please send me capabilities of client role. (which plugin add this role? To know what i mean with capabilities please see https://codex.wordpress.org/Roles_and_Capabilities)

Please add following code in your theme’s (child themes if any) functions.php

add_filter( 'fep_admin_cap', function( $admin_cap ){
    return 'administrator';
});

If still it does not work then i need to debug your website with php code. You can deactivate all plugins except this and change theme to one of default theme (unmodified). Then test. Then activate one by one.
OR you can give me FTP access (only wp-content directory access is ok) so that i can debug your website. If you give me FTP access please use https://www.shamimsplugins.com/sensitive-information/

Exclude your message/announcement page from caching.