PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791353119',
];

$_COOKIE = [
    '_csrf' => '21a8eeb0c318dc975a29028a0dad964b6d10a0ba9fd7c11a45c0e97f881db52fa:2:{i:0;s:5:"_csrf";i:1;s:32:"Vsh78NGsVAEX2SRMXqgn7kJS1H_jcaye";}',
    'PHPSESSID' => 'rin5ag40f66vpga52vqqus52v1',
    'topics-session' => '1791594055.145.16478.173104|d197bbbd1d400bd72372bc93068ad169',
];

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