PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791525877',
];

$_COOKIE = [
    'topics-session' => '1791967789.233.16697.222003|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'vkujg6ujgga94h3pi0gj2m5tl5',
    '_csrf' => '8d3a218036d9171ea738f5db631a7ec2c544258abbd70cb7d8a2696dd6b9cbfaa:2:{i:0;s:5:"_csrf";i:1;s:32:"25mln6qkzaO1GhYXLUg5hl-0H9NzGCBy";}',
];

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