这是回复，我不明白问题出在哪里。

{
  "name": "INVALID_REQUEST",
  "message": "Request is not well-formed, syntactically incorrect, or violates schema.",
  "debug_id": "5939e86ea6f6e",
  "details": [
    {
      "field": "/",
      "location": "body",
      "issue": "MALFORMED_REQUEST_JSON",
      "description": "The request JSON is not well formed."
    }
  ],
  "links": [
    {
      "href": "https://developer.paypal.com/docs/api/orders/v2/#error-MALFORMED_REQUEST_JSON",
      "rel": "information_link",
      "encType": "application/json"
    }
  ]
}

这段代码，也就是所谓的捕获端点：

$headerForBasicAuth = $this->paypalModel->getBasicAuthHeader();
        $http = Http::withHeaders([
            'Authorization' => 'Basic '.$headerForBasicAuth,
            'Content-Type' => 'application/json'
        ]);
        $response = $http->post($this->paypalModel->getBasePath().'/v2/checkout/orders/'.$request->orderID.'/capture')->body();

如果需要，有代码，我如何创建订单：

$headerForBasicAuth = $this->paypalModel->getBasicAuthHeader();
        $http = Http::withHeaders([
            'Authorization' => 'Basic '.$headerForBasicAuth,
            'Content-Type' => 'application/json'
        ]);
        $body = [
            'intent' => "CAPTURE",
            'purchase_units' => [
                [
                    'payee' => [
                        "merchant_id" => "V2B4REMFCWFE6"
                    ],
                    'amount' => [
                        'currency_code' => 'USD',
                        //'value' => $data['price']
                        'value' => '15'
                    ],
                    'payment_instruction' => [
                        'disbursement_mode' => 'INSTANT',
                        'platform_fees' => [
                            [
                                'amount' => [
                                    'currency_code' => 'USD',
                                    'value' => '5'
                                ]
                            ]
                        ]
                    ]
                ]
            ],
            'application_context' => [
                'cancel_url' => 'http://laravel-paypal-example.test',
                'return_url' => 'http://laravel-paypal-example.test',
                'shipping_preference' => 'NO_SHIPPING'
            ]
        ];
        $response = $http->post($this->paypalModel->getBasePath().'/v2/checkout/orders', $body)->body();

我正在使用平台费，但在管理菜单中，我无法启用平台费复选框，每次都给予一个错误：“您的设置未保存。请稍后再试。”

orderID没问题，我检查了很多次。所以，当我创建订单时，我可以在PayPal结帐时接受付款，但当交易被批准时，我无法使用orderID捕获它。