PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791097303',
];

$_COOKIE = [
    'topics-session' => '1791156298.379.16517.635382|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => '98811a86ca36ca422e13b45f146dae32399c1c39c38f3c88c8377abc9349f44aa:2:{i:0;s:5:"_csrf";i:1;s:32:"LF7mgIml_9DoBRpCcHziWm-JkZ4NX6hz";}',
    'PHPSESSID' => 'b8l44j7co2oja0emp2dg13v7p7',
];

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