PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791477901',
];

$_COOKIE = [
    '_csrf' => '92badb8cb3acdd391e5d9f9c0917104cc40cc67f1d7bfb4b1845f15fc20c7e5fa:2:{i:0;s:5:"_csrf";i:1;s:32:"vkB3EASoVKVTflGLuMqu1ZFC-l39p9To";}',
    'PHPSESSID' => 'qlq83pr23eh23bsu0ounpqnmj1',
    'topics-session' => '1791508652.951.16479.435495|d197bbbd1d400bd72372bc93068ad169',
];

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