BAD VALUE: total_tax_amount

Question

I'm trying to send a request using Opencart to test Klarna payment, we can create order (For the testing environment they use https://api.playground.klarna.com/ + rest of URL), But when I'm trying to send request, It says that

BAD_VALUE: total_tax_amount

I have followed this solution link below BAD VALUE: order_tax_amount

This is my array structure -

[order_lines] => Array
    (
        [0] => Array
            (
                [type] => shipping_fee
                [name] => Free freight for orders over 600 Kr
                [quantity] => 1
                [unit_price] => 0
                [tax_rate] => 0
                [total_amount] => 0
                [total_tax_amount] => 0
                [total_discount_amount] => 0
            )

        [1] => Array
            (
                [type] => physical
                [reference] => 239082
                [name] => Tricky Ceiling Light
                [quantity] => 1
                [quantity_unit] => pcs
                [unit_price] => 389900
                [tax_rate] => 2501
                [total_amount] => 389900
                [total_tax_amount] => 78000
                [merchant_data] => 8funuYNjVnsI0TzV-mUCThlZs-NH2SPmZ83oC8HCqU8,
                [total_discount_amount] => 0
            )

        [2] => Array
            (
                [type] => physical
                [reference] => 239614
                [name] => Leeds Taklampa Råsilver 38cm
                [quantity] => 1
                [quantity_unit] => pcs
                [unit_price] => 299900
                [tax_rate] => 2501
                [total_amount] => 299900
                [total_tax_amount] => 60000
                [merchant_data] => 8funuYNjVnsI0TzV-mUCThlZs-NH2SPmZ83oC8HCqU8,
                [total_discount_amount] => 0
            )

    )

When I send only one product ([name] => Leeds Taklampa Råsilver 38cm), it's working fine and created orders But when the two products are sent together, then get this error.