Image optimisation not working

please create a php file with code

<?php
require('./wp-load.php');

use WpOrg\Requests\Autoload;
use WpOrg\Requests\Requests;
use WpOrg\Requests\Response;

if (class_exists('\WpOrg\Requests\Requests') && class_exists('\WpOrg\Requests\Autoload') && version_compare(PHP_VERSION, '5.6.0', '>=')) {
    Autoload::register();

    $complete_action = function($response, $id) {
        echo '<pre>';
        var_dump($response);
        echo '</pre>';
    };

    $requests = array(
        array('url' => 'https://ams3-worker.quic.cloud/', 'type' => 'GET',)
    );

    $options = array(
        'timeout' => 60,
        'connect_timeout' => 60,
        'complete' => $complete_action,
    );

    $responses = Requests::request_multiple($requests, $options);

} else {
    echo 'No class';
}

at same dir as your wp-config.php , then open it in browser, see what it returns.

I get this

object(WpOrg\Requests\Exception\Transport\Curl)#6806 (10) {
  ["message":protected]=>
  string(67) "77 error setting certificate file: /etc/pki/tls/certs/ca-bundle.crt"
  ["string":"Exception":private]=>
  string(0) ""
  ["code":protected]=>
  int(77)
  ["file":protected]=>
  string(65) "/home/digisolu/bwt.ba/wp-includes/Requests/src/Transport/Curl.php"
  ["line":protected]=>
  int(294)
  ["trace":"Exception":private]=>
  array(2) {
    [0]=>
    array(5) {
      ["file"]=>
      string(59) "/home/digisolu/bwt.ba/wp-includes/Requests/src/Requests.php"
      ["line"]=>
      int(585)
      ["function"]=>
      string(16) "request_multiple"
      ["class"]=>
      string(29) "WpOrg\Requests\Transport\Curl"
      ["type"]=>
      string(2) "->"
    }
    [1]=>
    array(5) {
      ["file"]=>
      string(30) "/home/digisolu/bwt.ba/test.php"
      ["line"]=>
      int(27)
      ["function"]=>
      string(16) "request_multiple"
      ["class"]=>
      string(23) "WpOrg\Requests\Requests"
      ["type"]=>
      string(2) "::"
    }
  }
  ["previous":"Exception":private]=>
  NULL
  ["type":protected]=>
  string(8) "cURLEasy"
  ["data":protected]=>
  object(CurlHandle)#6801 (0) {
  }
  ["reason":protected]=>
  string(64) "error setting certificate file: /etc/pki/tls/certs/ca-bundle.crt"
}

string(67) "77 error setting certificate file: /etc/pki/tls/certs/ca-bundle.crt"

this is the error , somehow the ca cert was not working properly

the test code was calling wordpress and use its requests library to send a http request , nothign to do with any plugin but only wordpress core function.

it looks like some server-side issue , please check with your hosting provider , maybe something like reinstall ca-cert ought do it