PHP Core Warning – yii\base\ErrorException

$_GET = [
    'page' => '19',
];

$_COOKIE = [
    '_csrf' => '7d3db7f76a1e5e4d5afab0db34f9bab9a89b091f79b14f1cabd3b345a6026778a:2:{i:0;s:5:"_csrf";i:1;s:32:"8DV7J147S5ZaT688PoQheVHzJOKFwWOE";}',
    'PHPSESSID' => '23skbs00bucq92fhs2og437c1m',
];

$_SESSION = [
    '__flash' => [],
];