PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1790972346',
];

$_COOKIE = [
    'topics-session' => '1791199975.345.16476.123245|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'mviclvt803hintnaq2jlrjdho4',
    '_csrf' => '8db2c1d23a689ecdfeb336ad5beb83dedf6fc46f438a161a8b56f6ff2a8408dfa:2:{i:0;s:5:"_csrf";i:1;s:32:"UmuiG5sKYRniZ-75R2yMcXLbGd7D7Qbw";}',
];

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