PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791359636',
];

$_COOKIE = [
    'topics-session' => '1791549770.381.16958.937490|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => '3f05fec4432952fc4ea627ede3ef328dc6366ecce73a0e7938fe91a528eea0d7a:2:{i:0;s:5:"_csrf";i:1;s:32:"sdqk841JxLqsOEgKR8tmVJAHjv0aNpHJ";}',
    'PHPSESSID' => 'quqi3lm90eneb5tmjnb3cah295',
];

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