PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791037684',
];

$_COOKIE = [
    'topics-session' => '1791250951.738.16974.763766|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => '8fd0d13da5d71864132d58b8f89a6047c77ed2bfec4c6c32eec156eb986f395fa:2:{i:0;s:5:"_csrf";i:1;s:32:"m11sgFDpwoihyPvxgI3_1j0DOdYv1kCM";}',
    'PHPSESSID' => 'jtp1gkfhvvs7jsunctedr10744',
];

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