I was getting the same thing. Here’s how I fixed it.
I commented out lines 201-204 in the /wpcontent/plugins/new-user-approve/includes/user-list.php
If you are accessing the file via the GUI editor, edit the New User Approve plugin… and select file new-user-approve/includes/user-list.php
Look for the filter_by_status function and comment out:
$screen = get_current_screen();
if ( isset( $screen ) && 'users' != $screen->id ) {
return;
}