Error:  Data structure returned is not convertible in the requested format. Try to call this method with the parameters '&format=original&serialize=1'; you will get the original php data structure serialized. The data structure looks like this: 
 $data = array (
  0 => 
  array (
    0 => 
    array (
      0 => '2024-03-26',
      1 => 
      array (
        'count' => 0,
        'starred' => 0,
      ),
    ),
    1 => 
    array (
      0 => '2024-03-27',
      1 => 
      array (
        'count' => 0,
        'starred' => 0,
      ),
    ),
    2 => 
    array (
      0 => '2024-03-28',
      1 => 
      array (
        'count' => 0,
        'starred' => 0,
      ),
    ),
    3 => 
    array (
      0 => '2024-03-29',
      1 => 
      array (
        'count' => 0,
        'starred' => 0,
      ),
    ),
    4 => 
    array (
      0 => '2024-03-30',
      1 => 
      array (
        'count' => 0,
        'starred' => 0,
      ),
    ),
    5 => 
    array (
      0 => '2024-03-31',
      1 => 
      array (
        'count' => 0,
        'starred' => 0,
      ),
    ),
    6 => 
    array (
      0 => '2024-04-01',
      1 => 
      array (
        'count' => 0,
        'starred' => 0,
      ),
    ),
    7 => 
    array (
      0 => '2024-04-02',
      1 => 
      array (
        'count' => 0,
        'starred' => 0,
      ),
    ),
    8 => 
    array (
      0 => '2024-04-03',
      1 => 
      array (
        'count' => 0,
        'starred' => 0,
      ),
    ),
    9 => 
    array (
      0 => '2024-04-04',
      1 => 
      array (
        'count' => 0,
        'starred' => 0,
      ),
    ),
    10 => 
    array (
      0 => '2024-04-05',
      1 => 
      array (
        'count' => 0,
        'starred' => 0,
      ),
    ),
    11 => 
    array (
      0 => '2024-04-06',
      1 => 
      array (
        'count' => 0,
        'starred' => 0,
      ),
    ),
    12 => 
    array (
      0 => '2024-04-07',
      1 => 
      array (
        'count' => 0,
        'starred' => 0,
      ),
    ),
    13 => 
    array (
      0 => '2024-04-08',
      1 => 
      array (
        'count' => 0,
        'starred' => 0,
      ),
    ),
    14 => 
    array (
      0 => '2024-04-09',
      1 => 
      array (
        'count' => 0,
        'starred' => 0,
      ),
    ),
    15 => 
    array (
      0 => '2024-04-10',
      1 => 
      array (
        'count' => 0,
        'starred' => 0,
      ),
    ),
    16 => 
    array (
      0 => '2024-04-11',
      1 => 
      array (
        'count' => 0,
        'starred' => 0,
      ),
    ),
    17 => 
    array (
      0 => '2024-04-12',
      1 => 
      array (
        'count' => 0,
        'starred' => 0,
      ),
    ),
    18 => 
    array (
      0 => '2024-04-13',
      1 => 
      array (
        'count' => 0,
        'starred' => 0,
      ),
    ),
    19 => 
    array (
      0 => '2024-04-14',
      1 => 
      array (
        'count' => 0,
        'starred' => 0,
      ),
    ),
    20 => 
    array (
      0 => '2024-04-15',
      1 => 
      array (
        'count' => 0,
        'starred' => 0,
      ),
    ),
    21 => 
    array (
      0 => '2024-04-16',
      1 => 
      array (
        'count' => 0,
        'starred' => 0,
      ),
    ),
    22 => 
    array (
      0 => '2024-04-17',
      1 => 
      array (
        'count' => 0,
        'starred' => 0,
      ),
    ),
    23 => 
    array (
      0 => '2024-04-18',
      1 => 
      array (
        'count' => 0,
        'starred' => 0,
      ),
    ),
    24 => 
    array (
      0 => '2024-04-19',
      1 => 
      array (
        'count' => 0,
        'starred' => 0,
      ),
    ),
    25 => 
    array (
      0 => '2024-04-20',
      1 => 
      array (
        'count' => 0,
        'starred' => 0,
      ),
    ),
    26 => 
    array (
      0 => '2024-04-21',
      1 => 
      array (
        'count' => 0,
        'starred' => 0,
      ),
    ),
    27 => 
    array (
      0 => '2024-04-22',
      1 => 
      array (
        'count' => 0,
        'starred' => 0,
      ),
    ),
    28 => 
    array (
      0 => '2024-04-23',
      1 => 
      array (
        'count' => 0,
        'starred' => 0,
      ),
    ),
    29 => 
    array (
      0 => '2024-04-24',
      1 => 
      array (
        'count' => 0,
        'starred' => 0,
      ),
    ),
  ),
);