PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791490967',
];

$_COOKIE = [
    'PHPSESSID' => 'obpgme4cllgttnqtfh51h20d50',
    '_csrf' => 'f6b08498285474864ac852950ad6fb0ce1fa7cacc8037e7725b4801b5cabf069a:2:{i:0;s:5:"_csrf";i:1;s:32:"XqA__HP9kw3_q8hxnV-5GR2_LMUSHc3Y";}',
    'topics-session' => '1791771637.815.16901.100546|d197bbbd1d400bd72372bc93068ad169',
];

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