Vk api groups.getMembers?

Question

PHP

There is a code

<?php 
 
$parameters = array(
  'group_id' => '206341834',
  'count' => 10,
  'access_token' => '49b128115cb022e27dc53404deaaef04c86a2c60235119744d2cd7b11ecafd0e151473152308b2229ee10',
  'v' => '5.80'
);
 
$obj = json_decode(file_get_contents('https://api.vk.com/method/groups.getMembers?' . http_build_query($parameters), true));
 
echo number_format($obj->{'response'}->{'count'}, 0, '', ' ');

It is necessary that it displays: Number + "participants", I indicate

echo number_format($obj->{'response'}->{'count'}, 0, '', ' ') участников;

and the script stops working