Getting error as "NoneType object is not iterable"

[punitbadal]

@Suditya_Gupta1 getting error while creating order. Payload:

 "shipments": [
                {
                    "line_items": [
                        {
                            "charges": [
                                {
                                    "name": "Amount Paid",
                                    "amount": {
                                        "currency": "INR",
                                        "value": 200.0
                                    },
                                    "type": "amount_paid"
                                },
                                {
                                    "name": "Unit Price",
                                    "amount": {
                                        "currency": "INR",
                                        "value": 200.0
                                    },
                                    "type": "unit_price"
                                },
                                {
                                    "name": "Value Of Good",
                                    "amount": {
                                        "currency": "INR",
                                        "value": 200.0
                                    },
                                    "type": "value_of_good"
                                }
                            ],
                            "quantity": 1,
                            "seller_identifier": "SKU001"
                        }
                    ],
                    "meta": {
                        "invoice_id": "INV877357544"
                    },
                    "location_id": 26583,
                    "order_type": "PickAtStore"
                }
            ],
            "shipping_info": {
                "state": "Maharashtra",
                "primary_mobile_number": "90338343969",
                "first_name": "DD",
                "country": "India",
                "city": "Mumbai",
                "address1": "Fynd",
                "pincode": "400101",
                "primary_email": "tapandesai@gofynd.com"
            },
            "billing_info": {
                "state": "Maharashtra",
                "primary_mobile_number": "9033843969",
                "first_name": "DD",
                "country": "India",
                "city": "Mumbai",
                "address1": "Fynd",
                "pincode": "400101",
                "primary_email": "tapandesai@gofynd.com"
            },
            "external_order_id": "R030290000406032024",
            "charges": [
                {
                    "name": "Order Value",
                    "amount": {
                        "value": "200.00",
                        "currency": "INR"
                    },
                    "type": "order_value"
                }
            ],
            "external_creation_date": "Wed Jan 20 2024 06:45:00 GMT 0000 (Coordinated Universal Time)",
            "meta": {
                "store_code": "demolocation1",
                "order_platform": "rpos",
                "channel": "DoboDev"
            },
            "config": {
            "lock_states": [
                "order_locked"
            ],
            "payment": {
                "source": "MARKETPLACE",
                "mode_of_payment": "DOBO"
            },
                "dp_configuration": {
                    "shipping_by": "fynd"
                },
                "payment": {
                    "source": "ECOMM",
                    "token": "A8U6de8mV"
                }
            },
            "payment_info": {
                "primary_mode": "DEBIT",
                "payment_methods": [
                    {
                        "collect_by": "seller",
                        "mode": "CASH",
                        "refund_by": "seller",
                        "name": "LC REF",
                        "amount": 200.0
                    }
                ]
            },
            "user_info": {
                "primary_email": "paymentsdummy@gofynd.com",
                "first_name": "Guest",
                "last_name": "Customer",
                "primary_mobile_number": " 919999999999"
            }
        }