example.php

<?php

$this->client = new Client([
    'base_url' => 'https://app.snipcart.com/api/',
    'auth' => [
        'ST_NTI3OTljM.......',
        ':'
    ],
    'headers' => [
        'accept' => 'application/json'
    ]
]);

$response = $this->client->request('GET', 'orders', ['query' => $parameters]); // This leads to a curl error (hostname could not be resolved)

// ----------------------------------------

$this->client->request('GET', 'https://app.snipcart.com/api/orders?offset=0&limit=50&status=processed', [
    'auth' => [
        'ST_NTI3OT.....',
        ':'
    ],
    'headers' => [
        'accept' => 'application/json'
    ]])
  ->getBody()->getContents();

// This works as expected, what is the difference?