PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791580717',
];

$_COOKIE = [
    'PHPSESSID' => '65do651qkf2tmrmn0nvifg5fs5',
    'topics-session' => '1791752357.031.16974.676737|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => 'f466a5efdd315d3411fc5d72ebe74720fdd49fcd38e934ccb14bd504378f687ea:2:{i:0;s:5:"_csrf";i:1;s:32:"MHbYk1zWL4kHtSDYky81Rmmy23ZlAI2x";}',
];

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