PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791482141',
];

$_COOKIE = [
    'PHPSESSID' => 'iceerpulfe1uf894jr0lrb5ea3',
    '_csrf' => 'cedbf9009ee8f4628109a7a256e63446be996d3356da755500237b560842ce2aa:2:{i:0;s:5:"_csrf";i:1;s:32:"BERHiYlTIFBNo0NwfspfleGhKGds8C85";}',
    'topics-session' => '1791938177.703.17009.280746|d197bbbd1d400bd72372bc93068ad169',
];

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