Error:  Data structure returned is not convertible in the requested format. Try to call this method with the parameters '&amp;format=original&amp;serialize=1'; you will get the original php data structure serialized. The data structure looks like this: 
 $data = array (
  0 =&gt; 
  array (
    'idcontainer' =&gt; 'BjLOfXPM',
    'idsite' =&gt; 1,
    'context' =&gt; 'web',
    'name' =&gt; 'Default Container',
    'description' =&gt; 'This container was auto generated when the website was created.',
    'status' =&gt; 'active',
    'created_date' =&gt; '2020-12-17 01:37:26',
    'updated_date' =&gt; '2020-12-17 01:37:26',
    'created_date_pretty' =&gt; 'Dec 17, 2020 02:37:26',
    'updated_date_pretty' =&gt; 'Dec 17, 2020 02:37:26',
    'versions' =&gt; 
    array (
      0 =&gt; 
      array (
        'idcontainerversion' =&gt; 2,
        'idcontainer' =&gt; 'BjLOfXPM',
        'idsite' =&gt; 1,
        'status' =&gt; 'active',
        'revision' =&gt; 1,
        'name' =&gt; '0.1.0 - Auto generated',
        'description' =&gt; '',
        'created_date' =&gt; '2020-12-17 01:37:26',
        'updated_date' =&gt; '2020-12-17 01:37:26',
        'created_date_pretty' =&gt; 'Dec 17, 2020 02:37:26',
        'updated_date_pretty' =&gt; 'Dec 17, 2020 02:37:26',
        'environments' =&gt; 
        array (
        ),
      ),
    ),
    'releases' =&gt; 
    array (
      0 =&gt; 
      array (
        'idcontainerrelease' =&gt; 1,
        'idcontainer' =&gt; 'BjLOfXPM',
        'idcontainerversion' =&gt; 1,
        'idsite' =&gt; 1,
        'status' =&gt; 'active',
        'environment' =&gt; 'live',
        'release_login' =&gt; 'anonymous',
        'release_date' =&gt; '2020-12-17 01:37:26',
        'release_date_pretty' =&gt; 'Dec 17, 2020 02:37:26',
        'version_name' =&gt; '',
      ),
    ),
    'draft' =&gt; 
    array (
      'idcontainerversion' =&gt; 1,
      'idcontainer' =&gt; 'BjLOfXPM',
      'idsite' =&gt; 1,
      'status' =&gt; 'active',
      'revision' =&gt; 0,
      'name' =&gt; '',
      'description' =&gt; '',
      'created_date' =&gt; '2020-12-17 01:37:26',
      'updated_date' =&gt; '2020-12-17 01:37:26',
      'created_date_pretty' =&gt; 'Dec 17, 2020 02:37:26',
      'updated_date_pretty' =&gt; 'Dec 17, 2020 02:37:26',
    ),
  ),
);