PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791011705',
];

$_COOKIE = [
    'topics-session' => '1791252590.054.16481.985026|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'cuboqk6o5ir6h5a46c9tk8q653',
    '_csrf' => '6885fa0018dbfef5adcccd0aeeb5a9ca50bc18be29bb20405f33acdef672d678a:2:{i:0;s:5:"_csrf";i:1;s:32:"rpnFIZ_gawsVdsHBSH8U4gX_YJ2hrt7n";}',
];

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