PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791405677',
];

$_COOKIE = [
    'topics-session' => '1791426571.989.16490.272730|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'u2bq0nnqe2bqvpigj4rt99h0a6',
    '_csrf' => '9968f4d7b0dac5d4ddd5b216c01634fb2fca2d2562184ce3ed9c1045bf64e21ea:2:{i:0;s:5:"_csrf";i:1;s:32:"uZ9NcRAmXkV8mEMc4p_o5qFFg7vTdP8V";}',
];

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