PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791438233',
];

$_COOKIE = [
    'topics-session' => '1791468860.873.16476.544044|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'iatje2nmmn9olddea3jplnif85',
    '_csrf' => '1af4f593894e7b89834ae68143bc95316989d676166f7ad188c863b915504944a:2:{i:0;s:5:"_csrf";i:1;s:32:"PgzUsuL1cT_cWOas-E2r6Lim7gYj8Egr";}',
];

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