Errors Accentuation Querypath

Question

I’m using one of the recommended Ibraries in this answer, Querypath. To get the data I’m using Guzzle.

However, I am having problems in the return of data (accentuation), it is replacing the characters by ?.

OBS: The problem is not in the Guzzle, because I tested with another parser, that according to the above answer is not one of the recommended... and also did not continue its use by not meet some complex html’s that I need to treat... but the fact is, that it returned the accent correctly.

Tested solutions without success:

//Primeira Tentativa
$content = mb_convert_encoding($resposta->getBody()->getContents(), 'UTF-8', 'auto');
$html = htmlqp($content); // Problema acentuação ?????????

//Segunda Tentativa
$html5 = new HTML5();
$content = $html5->loadHTML($resposta->getBody()->getContents());
$html = htmlqp($content); // Problema acentuação ?????????

//Terceira Tentativa
$qp = html5qp($resposta->getBody()->getContents());

//Quarta Tentativa
$options = ['convert_to_encoding' => 'UTF-8'];
$qp = htmlqp($resposta->getBody()->getContents(), null, $options);

I no longer know what to test.... What could be?