PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791637332',
];

$_COOKIE = [
    'PHPSESSID' => 'rk2nf8okdp3upu3dk6hlgt20h7',
    '_csrf' => 'cccd913010899a98727b0d9940198885c05b5584294bc92e48ebe02e7a415b99a:2:{i:0;s:5:"_csrf";i:1;s:32:"OQmPcsDIuiQIyKeAXKdDr6wrxvzMhQRP";}',
    'topics-session' => '1791836542.476.16814.870113|d197bbbd1d400bd72372bc93068ad169',
];

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