PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791233918',
];

$_COOKIE = [
    '_csrf' => 'fdcb6746a42aa669d0db85d7d16d786c15280281d4b0e7148d46f7038f57f31aa:2:{i:0;s:5:"_csrf";i:1;s:32:"M94qbTHmgh5aUJKi07jjV1JHYMltS7Zw";}',
    'topics-session' => '1791324653.514.16475.689588|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'ipf9km4a5ev7k7u8qhr6h2rjo3',
];

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