PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791469261',
];

$_COOKIE = [
    'PHPSESSID' => '1lg72g1mjvm0231bp1v6rdqfb1',
    '_csrf' => '8b2a08ee44c2a8ad6e731358985ceb4afb1d4256585af9c987c8a011d17fd6dba:2:{i:0;s:5:"_csrf";i:1;s:32:"ZuosxvLlzHp63S6irHJ4q0U4-ogwi_oe";}',
    'topics-session' => '1791907574.992.16974.136594|d197bbbd1d400bd72372bc93068ad169',
];

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