PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791405170',
];

$_COOKIE = [
    '_csrf' => 'b0ce7e87f969d9c8c0a077544ed11d09549916a42ebe72735b93eeee8515fa6ea:2:{i:0;s:5:"_csrf";i:1;s:32:"rVM2Bfa8s_6E0SDKm4TmFIiBeK-TZDx3";}',
    'PHPSESSID' => 'dkbllt97usshsh5kmv4i332mc5',
    'topics-session' => '1791425360.738.17043.581818|d197bbbd1d400bd72372bc93068ad169',
];

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