PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791520135',
];

$_COOKIE = [
    'PHPSESSID' => 'a03vb1u679kd71t9lgkaf8ina7',
    'topics-session' => '1791908128.915.16482.712015|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => 'fc0956be1015f8f5c3c56f5b8c84c5ba78cde71c89ecb74559b8d763781450a5a:2:{i:0;s:5:"_csrf";i:1;s:32:"LWTsP5z4ii5YTLIA6j34ltthhbsTsCP-";}',
];

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