PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791027633',
];

$_COOKIE = [
    'topics-session' => '1791057457.221.17043.488431|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'ckips3bm6apk31c5ak55tcbbb6',
    '_csrf' => 'fb69e3f9d1d57d4ba511df456f24516148f7c420615bd395c2ca686c804078eba:2:{i:0;s:5:"_csrf";i:1;s:32:"eaQgv4sjXzg9LrdUdSmRWhB-rYPn5KM8";}',
];

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