PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791900562',
];

$_COOKIE = [
    'PHPSESSID' => 'jd9emters0d741i18kabha84i2',
    'topics-session' => '1792035946.521.17009.130140|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => '611dfee0d2a116efe21964d9994090efb96696a38fd9a36bdc82681f48392a91a:2:{i:0;s:5:"_csrf";i:1;s:32:"t2cnn8hmWu2ChKAscVCMJztw249hbtLc";}',
];

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