Shippo Error You must pass an array as the first argument to Shippo API

[maya-hamdan]

this error keeps showing, im using shippo in laravel app and i generated a test api key
i put in my env :
SHIPPO_PRIVATE=shippo_test_cc2023********************************************
and I called it in my shippo class like so:
public function __construct() { // Grab this private key from .env and setup the Shippo api Shippo::setApiKey(env('SHIPPO_PRIVATE')); }

what Im I doing worng please help