PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791379072',
];

$_COOKIE = [
    'topics-session' => '1791431735.401.16477.73801|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'rges96st4m69m8i6vqcsj9ine4',
    '_csrf' => 'f349d193afc02bb840de2a40798bd56719a81e658d0a9b42b0eecd7cb5152061a:2:{i:0;s:5:"_csrf";i:1;s:32:"iT3DArhJwh-O1aYbRRC5X2AE97AIyrdJ";}',
];

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