Error: Data structure returned is not convertible in the requested format: Multidimensional column values not supported. Found unexpected array value for column 'included_targets' in row '0': 'array (
  0 => 
  array (
    'attribute' => 'path',
    'inverted' => '0',
    'type' => 'starts_with',
    'value' => '/diving/',
  ),
)'. Try to call this method with the parameters '&format=original&serialize=1'; you will get the original php data structure serialized.