PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1790982888',
];

$_COOKIE = [
    '_csrf' => '7d0a28cf303bf89e6bd45cb9cf6645c292b9891202c9eea32d6caa7760fc321aa:2:{i:0;s:5:"_csrf";i:1;s:32:"tWEmxPdSclW3lW4MOPUOK7T0biaifeSk";}',
    'topics-session' => '1790999565.869.16481.349319|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'idd1e3809h8mn40ap64883hu16',
];

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