I want to wp ajax for all users frontend but showing error of 302 Found and calling home page except admins.
I looked this thread and added the code below to the functions.php of my theme.

function custom_blockusers_init() {
  if ( is_admin() && !defined('DOING_AJAX') && ( 
  current_user_can('usercrp') || current_user_can('userpcp') ||  
  current_user_can('subscriber') || current_user_can('contributor') || 
  current_user_can('editor'))) {
    session_destroy();
    wp_logout();
    wp_redirect( home_url() );
   exit;
  }
 }
add_action( 'init', 'custom_blockusers_init' );

Now it only works for admin and editors but still not working for subscribers and visitors.

How can i fix this? Thank you from now.