The method '[]' was called on null

[sidrahassanpk]

Getting following error:-

The method '[]' was called on null.
Receiver: null
Tried calling: []("images")

When the exception was thrown, this was the stack
#0      Object.noSuchMethod  (dart:core-patch/object_patch.dart:51:5)
#1      _MyOrderPageState.build.<anonymous closure>.<anonymous closure> 
package:apps/order.dart:80
#2      SliverChildBuilderDelegate.build 
package:flutter/…/widgets/sliver.dart:442
#3      SliverMultiBoxAdaptorElement._build.<anonymous closure> 
package:flutter/…/widgets/sliver.dart:1153
#4      _HashMap.putIfAbsent  (dart:collection-patch/collection_patch.dart:137:29)

Here is the code:-

import 'dart:async';
import 'package:flutter/material.dart';
import 'package:woocommerce_api/woocommerce_api.dart';


class OrderPage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      title: 'Flutter Demo',
      theme: new ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: new MyOrderPage(title: 'WooCommerce API Demo'),
    );
  }
}

class MyOrderPage extends StatefulWidget {
  MyOrderPage({Key key, this.title}) : super(key: key);

  final String title;

  @override
  _MyOrderPageState createState() => _MyOrderPageState();
}

class _MyOrderPageState extends State<MyOrderPage> {

  List<Widget> products = [];

  Future getProducts() async {

    /// Initialize the API
    WooCommerceAPI wcApi = WooCommerceAPI(
        "https://panahgah.com",
        "*****************************************************",
        "*****************************************************"
    );
    
    /// Get data using the endpoint
    var p = await wcApi.getAsync("products");
    return p;
  }


  @override
  void initState() {
    super.initState();
  }
  

  @override
  Widget build(BuildContext context) {
    return new Scaffold(
      
      appBar: new AppBar(
        title: new Text(widget.title),
      ),
      
      body: FutureBuilder(
        future: getProducts(),
        builder: (_, s){

          if(s.data == null){
            return Container(
              child: Center(
                child: Text("Loading..."),
              ),
            );
          }

          return ListView.builder(
            itemCount: s.data.length,
            itemBuilder: (_, index){
            
            /// create a list of products
              return ListTile(
                leading: CircleAvatar(
                  child: Image.network(s.data[index]["images"][0]["src"]),
                ), 
                title: Text(s.data[index]["name"]),
                subtitle: Text("Buy now for \$ " + s.data[index]["price"]),
              );

            }
          );
        },
      ),
    );
  }
}

My JSON is working fine. Here is the output from my website:-

[
{
"id": 24,
"name": "Ginger",
"slug": "ginger",
"permalink": "https://panahgah.com/product/ginger/",
"date_created": "2019-11-30T17:57:51",
"date_created_gmt": "2019-11-30T17:57:51",
"date_modified": "2019-11-30T17:57:55",
"date_modified_gmt": "2019-11-30T17:57:55",
"type": "simple",
"status": "publish",
"featured": false,
"catalog_visibility": "visible",
"description": "",
"short_description": "",
"sku": "",
"price": "30",
"regular_price": "30",
"sale_price": "",
"date_on_sale_from": null,
"date_on_sale_from_gmt": null,
"date_on_sale_to": null,
"date_on_sale_to_gmt": null,
"price_html": "<span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">&#8360;</span>30.00</span>",
"on_sale": false,
"purchasable": true,
"total_sales": 4,
"virtual": false,
"downloadable": false,
"downloads": [],
"download_limit": -1,
"download_expiry": -1,
"external_url": "",
"button_text": "",
"tax_status": "taxable",
"tax_class": "",
"manage_stock": false,
"stock_quantity": null,
"stock_status": "instock",
"backorders": "no",
"backorders_allowed": false,
"backordered": false,
"sold_individually": false,
"weight": "",
"dimensions": {
"length": "",
"width": "",
"height": ""
},
"shipping_required": true,
"shipping_taxable": true,
"shipping_class": "",
"shipping_class_id": 0,
"reviews_allowed": false,
"average_rating": "0.00",
"rating_count": 0,
"related_ids": [
22,
21
],
"upsell_ids": [],
"cross_sell_ids": [],
"parent_id": 0,
"purchase_note": "",
"categories": [
{
"id": 22,
"name": "Vegetables",
"slug": "vegetables"
}
],
"tags": [],
"images": [],
"attributes": [
{
"id": 1,
"name": "Unit",
"position": 0,
"visible": true,
"variation": false,
"options": [
"1/4 KG"
]
}
],
"default_attributes": [],
"variations": [],
"grouped_products": [],
"menu_order": 0,
"meta_data": [],
"_links": {
"self": [
{
"href": "https://panahgah.com/wp-json/wc/v3/products/24"
}
],
"collection": [
{
"href": "https://panahgah.com/wp-json/wc/v3/products"
}
]
}
},
]

P.S: I have hidden Consumer Key and Consumer Secret for this post