Filtrado por fecha no esta funcionando

[radolan71]

Al mandar los siguientes parametros, the API breaks

Request

$params =[
    'q' => 'XAXX010101000'
    'date' => [
            'gte' => '2019-03-01'
            'lte' => '2019-03-31'
        ]
];

(new Facturapi($apiKey))->Invoices->all($params);

Response

stdClass Object
(
    [message] => Cast to date failed for value "{}" at path "created_at" for model "Invoice"
    [ok] => 
)