PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1790891901',
];

$_COOKIE = [
    'PHPSESSID' => 'raft9qqt14lkgqpqglh3i0d9a0',
    '_csrf' => '78fdafcec5d34a3dc0db4d0cb85735520755c0ab160560fe0878454da0f14deca:2:{i:0;s:5:"_csrf";i:1;s:32:"bT_ywyEvoUcpL02Fc_Wcy5A347STBX9d";}',
    'topics-session' => '1790904324.068.16479.497204|d197bbbd1d400bd72372bc93068ad169',
];

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