Why is Woocommerce Order Update API Giving "HTTP ERROR 500"? - php

Question

require __DIR__ . '/woo-api/vendor/autoload.php';
use Automattic\WooCommerce\HttpClient\HttpClientException;
use Automattic\WooCommerce\Client;
$woocommerce = new Client(
'https://mysite.info/',
$ck,
$cs,
[
'wp_api' => true, 'version' => 'wc/v3',
]
);
$data = ['status' => 'processing'];
$woocommerce->put('orders/1242', $data); // Not Working
$woocommerce->get('products')); // Working
$woocommerce->get('products')); // Working
$woocommerce->get('customers',array('per_page' => 100, 'page' => $page)));// Working
I'm trying to update order status .. but this is not working ! :(
is there anything wrong with this code ?
$woocommerce->get('products')); => working
$woocommerce->get('customers',array('per_page'=>100,'page' => $page)) => working
With the same code I can get the customers data, product data...
but when I try to Update an order
its giving me "HTTP ERROR 500"
And the error log is mentioned Bellow Error Log :
/home2/wpqwerty/public_html/wooapi/vendor/automattic/woocommerce/src/WooCommerce/HttpClient/HttpClient.php(422):
Automattic\WooCommerce\HttpClient\HttpClient->processResponse()
#1 /home2/wpqwerty/public_html/woo-api/vendor/automattic/woocommerce/src/WooCommerce/Client.php(69):
Automattic\WooCommerce\HttpClient\HttpClient->request('orders/1242',
'PUT', Array)
#2 /home2/wpqwerty/public_html/test_api.php(16): Automattic\WooCommerce\Client->put('orders/1242', Array) #3 {main}
thrown in
/home2/wpqwerty/public_html/wooapi/vendor/automattic/woocommerce/src/WooCommerce/HttpClient/HttpClient.php
on line 378