Cannot get or add Cart through API

[nick]

Laravel version: 8.76.2
Aimeos version: 2021.10
PHP version: 8.0.14

Environment: Nginx, Linux, Laravel

I am building an application using Aimeos APIs. The APIs for adding products to the cart works fine while using them with Postman. But inside the application when I try those APIs with GuzzleHttp, products won't add to the cart.

When hitting API to add a product, the response is as expected, but hitting again won't change the quantity. Also, fetching the cart returns an empty cart. My guess is that the session for the cart is not set properly by the application as the same APIs work in Postman.

I am not sure what I am missing in my application setup. I am using Laravel and have set SESSION_DRIVER=file. Also, I am sending setting the cookie in GuzzleHttp object with CSRF Token.
My complete GuzzleHttp Setting:

$cookieJar = CookieJar::fromArray(
[
'XSRF-TOKEN' => $_COOKIE['XSRF-TOKEN'],
strtolower(env('APP_NAME')) . '_session' => $_COOKIE[strtolower(env('APP_NAME')) . '_session']
],
env('APP_DOMAIN')
);
$this->headers = [
'Host' => env('APP_DOMAIN'),
'Accept' => 'application/json',
'Content-type' => 'application/json'
];
$this->client = new Client([
'base_uri' => env('APP_URL'),
'headers' => $this->headers,
'cookies' => $cookieJar
]);


Is there anything more that I need to change?

[aimeos]

Seems to be fine. The important parts are the cookies for "laravel_session" and CSRF token.