PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1790972151',
];

$_COOKIE = [
    'PHPSESSID' => 'h4jkmkupm153s6p7jjcb17i9p6',
    'topics-session' => '1791189544.487.16814.366599|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => '5037d87927c3d17fd53ca0339c54a09bcafb24a9ddec94cdf63de7f5e5e0c97fa:2:{i:0;s:5:"_csrf";i:1;s:32:"czKBRvnUWHXXeOC3xZK72QQ4arTRd0em";}',
];

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