PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791470655',
];

$_COOKIE = [
    'PHPSESSID' => 'ndgon2p592bg4ujokg06sdfef6',
    '_csrf' => '874877c28c511c027354b95b06fb59a4713fa6f5e31ac43245d185f2b4f7c8d1a:2:{i:0;s:5:"_csrf";i:1;s:32:"5TItqBO0fAEp8ZThzhb0AV-UBO9At0re";}',
    'topics-session' => '1792043867.317.16974.946280|d197bbbd1d400bd72372bc93068ad169',
];

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