PHP Core Warning – yii\base\ErrorException

$_GET = [
    'slug' => 'serena-zoli',
    'modelClass' => 'app\\models\\muv\\article\\FuvAuthor',
    'page' => '1',
    'per-page' => '10',
];

$_COOKIE = [
    '_csrf' => '8cd20a291ec38ac0866a7b5dc409c62c07e1a4406c20d054d7039293431e26e1a:2:{i:0;s:5:"_csrf";i:1;s:32:"OVlRY1c2a1FIMzRaZ2MwTkxoSUM2SnhK";}',
    'last-article' => 'e002185ef9236a2c4762afdeae7b39db75db8ed2425b9948b6b1cefcd606827fa:2:{i:0;s:12:"last-article";i:1;i:15518;}',
    'identity-fe' => '5ul27qp60nch7jkod2mshkftu0',
];

$_SESSION = [
    '__flash' => [],
    '__returnUrl' => '/magazine/giornalisti/serena-zoli?page=1&per-page=10',
];