[Solved] Package Add Document - 406 Not Allowed

Hi,

  I'm trying to send an extra document to an existing package (with no document) using the REST API endpoint /api/packages/{packageId}/documents.

  Doing so returns me a "406 Not Acceptable" error, which doesn't tell me much on what is wrong.

  I've checked again and again with documentation, and my JSON has the right structure.

  I've also tested based on this tutorial and I'm getting the same, even if I trim down my test to the minimum like that example do: https://community.onespan.com/documentation/onespan-sign/guides/feature-guides/developer/uploading-deleting-documents

  I'm using GuzzleHttp\Client in PHP to send my payload.

  Here the code:

$payload = [
  [
    'id' => 'file.88',
    'name' => 'sample-single-page.pdf',
    'index' => '0',
    'approvals' => [[
        'fields' => [[
            'width' => '126',
            'height' => '48',
            'top' => '315',
            'left' => '424',
            'page' => '1',
            'type' => 'SIGNATURE',
            'subtype' => 'CAPTURE',
          ],
        ],
        'role' => 'representative.5',
        'id' => 'signature.rep-5',
      ],[
        'fields' => [[
            'width' => '229',
            'height' => '40',
            'top' => '256',
            'left' => '328',
            'page' => '1',
            'type' => 'SIGNATURE',
            'subtype' => 'CAPTURE',
          ],
        ],
        'role' => 'signer.188',
        'id' => 'signature.sig-188',
      ],
    ],
  ],
];

self::$client = new \GuzzleHttp\Client([
  'base_uri' => 'https://sandbox.esignlive.com/api/',
  'headers' => [
    'Accept' => 'application/json',
    'Authorization' => 'Basic ' . self::$apiKey
  ]
]);

$request = ['multipart' => [[
  'name' => 'file',
  'filename' => 'sample-single-page.pdf',
  'contents' => $content
], [
  'name' => 'payload',
  'contents' => json_encode($payload)
]]];

$response = self::$client->request('POST', 'packages/' . rawurlencode($packageid) . '/documents', $request);