Encountering error "Parameter specified as non-null is null" when attempting purchase

Everything is configured correctly on RevenueCat and the app stores, and I’m able to fetch and display my offerings using `Purchases.getOfferings()`.

console.log(offerings.current.availablePackages);


LOG  [{"identifier": "pay_black", "offeringIdentifier": "default", "packageType": "CUSTOM", "product": {"currencyCode": "KRW", "defaultOption": null, "description": "Test1", "discounts": null, "identifier": "pay_black", "introPrice": null, "presentedOfferingIdentifier": "default", "price": 10000, "priceString": "₩10,000", "productCategory": "NON_SUBSCRIPTION", "productType": "CONSUMABLE", "subscriptionOptions": null, "subscriptionPeriod": null, "title": "Black"}}, {"identifier": "pay_blue", "offeringIdentifier": "default", "packageType": "CUSTOM", "product": {"currencyCode": "KRW", "defaultOption": null, "description": "Test2", "discounts": null, "identifier": "pay_blue", "introPrice": null, "presentedOfferingIdentifier": "default", "price": 30000, "priceString": "₩30,000", "productCategory": "NON_SUBSCRIPTION", "productType": "CONSUMABLE", "subscriptionOptions": null, "subscriptionPeriod": null, "title": "Blue"}}]

However, when I try to execute `Purchases.purchasePackage()`, I encounter the following error: “Parameter specified as non-null is null: method com.revenuecat.purchases.hybridcommon.CommonKt.purchasePackage, parameter packageIdentifier”

const { purchaserInfo, productIdentifier } = await Purchases.purchasePackage('pay_black');

A similar error occurs when I try to execute `Purchases.purchaseStoreProduct()`. The error suggests that I’m passing `null` as a parameter, but I’m definitely passing the correct identifier as a string.

Thanks in advance to anyone who can help me resolve this :)