Chart.js does not appear

UPDATE: Now the labels and the graph showing the quantity appear, but all gray with the names as undefined .

I'm trying to create a chart with Chart.js , but it does not appear in div , it is blank. I had already done one in this same project, but since I deleted a module and the DB related to it, I had to create another graphic with other data, and now it goes blank.

I have the latest Chart.min.js installed.

The function for generating the data is this:

public function getTypeList($id_company){
    $array = array('0'=>0, '1'=>0, '2'=>0, '3'=>0, '4'=>0);
      $sql = "SELECT COUNT(id) as total, type FROM inventory WHERE "
            . "id_company = :id_company "
            . "GROUP BY type ORDER BY type ASC";
    $sql = $this->db->prepare($sql);
    $sql->bindValue(':id_company', $id_company);
    $sql->execute();

   if($sql->rowCount() > 0){
        $rows = $sql->fetchAll();

        foreach ($rows as $sale_item){
            $array[$sale_item['type']] = $sale_item['total'];
        }
    }
    return $array;
}

The file js of the chart:

var rel2 = new Chart(document.getElementById("rel2"), {
type:'pie',
data:{
    labels: status_name_list,
    datasets: [{
        data: status_list,
        backgroundColor:['#0000FF','#32CD32','#FF0000', '#FFFFFF', '#000000']
    }]
  }
});  

The call on screen:

<div class="db-row row2">
  <div class="grid-1">
    <div class="db-info">
      <div class="db-info-title">Tipos de imóveis disponíveis para venda</div>
      <div class="db-info-body" style="height: 300px">
        <canvas id="rel2"></canvas>
      </div>
    </div>
  </div>
</div>

And finally the call in the controller:

$data['status_list'] = $i->getTypeList($user->getCompany());

It is not returning errors, the div where the graph should appear appears blank. When I gave a var_dump($rows) returned this data, but I do not know how to check it, I'm a beginner. It really came up with the name of the fields I need, (apartment, etc) but I do not know if it's returning the quantity correctly, or the reason it does not appear on the screen.

array(7) {
  [0]=> array(4) {
    ["total"]=> string(1) "4"
    [0]=> string(1) "4"
    ["type"]=> string(11) "Apartamento"
    [1]=> string(11) "Apartamento"
  }
  [1]=> array(4) {
    ["total"]=> string(2) "25"
    [0]=> string(2) "25"
    ["type"]=> string(4) "Casa"
    [1]=> string(4) "Casa"
  }
  [2]=> array(4) {
    ["total"]=> string(1) "1"
    [0]=> string(1) "1"
    ["type"]=> string(19) "Casa em Condomínio"
    [1]=> string(19) "Casa em Condomínio"
  }
  [3]=> array(4) {
    ["total"]=> string(1) "2"
    [0]=> string(1) "2"
    ["type"]=> string(9) "Cobertura"
    [1]=> string(9) "Cobertura"
  }
  [4]=> array(4) {
    ["total"]=> string(1) "1"
    [0]=> string(1) "1"
    ["type"]=> string(4) "cond"
    [1]=> string(4) "cond"
  }
  [5]=> array(4) {
    ["total"]=> string(1) "1"
    [0]=> string(1) "1"
    ["type"]=> string(11) "Condomínio"
    [1]=> string(11) "Condomínio"
  }
  [6]=> array(4) {
    ["total"]=> string(1) "3"
    [0]=> string(1) "3"
    ["type"]=> string(4) "Loja"
    [1]=> string(4) "Loja"
  }
}