not show list of recipients

Is your admin-ajax.php blocked for front-end ajax request?
Are you getting any js error?

there is no error in JS . how know that admin-ajax.php is blocked ?

was it working before? Did you change anything recently?
You can use browser developer tab to see if your ajax response code in 200.
in Firefox, Write click in webpage then click Inspect Element > Network > XHR

yes its working before

the response is 200
i noticed its showing list but after very long time

Did you change anything recently?

Also another post, i see you are using PRO version. if you are using PRO version please use https://www.shamimsplugins.com/support/forum/front-end-pm-pro/ for any support request. For wordpress support policy we cannot provide PRO version support here.