应用程序购买产品中的java Android错误未加载？

Question

产品和信息未加载。以下是错误块：

@Override
public void onPurchasesUpdated(BillingResult billingResult, @Nullable List<Purchase> purchases) {
    //if item newly purchased
    if (billingResult.getResponseCode() == BillingClient.BillingResponseCode.OK && purchases != null) {
        handlePurchases(purchases);
    }
    //if item already purchased then check and reflect changes
    else if (billingResult.getResponseCode() == BillingClient.BillingResponseCode.ITEM_ALREADY_OWNED) {
        Purchase.PurchasesResult queryAlreadyPurchasesResult = billingClient.queryPurchases(INAPP);
        List<Purchase> alreadyPurchases = queryAlreadyPurchasesResult.getPurchasesList();
        if(alreadyPurchases!=null){
            handlePurchases(alreadyPurchases);
        }
    }
    //if purchase cancelled
    else if (billingResult.getResponseCode() == BillingClient.BillingResponseCode.USER_CANCELED) {
        Toast.makeText(getApplicationContext(),"Purchase Canceled",Toast.LENGTH_SHORT).show();
    }
    // Handle any other error msgs
    else {
        Toast.makeText(getApplicationContext(),"Error1 "+billingResult.getDebugMessage(),Toast.LENGTH_SHORT).show();
    }
}

下面是它的样子。为什么产品不加载

Here is the Error Message, I can't buy the Product