PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791526449',
];

$_COOKIE = [
    'PHPSESSID' => 'rksctednp3unofijh6qbvbqur7',
    '_csrf' => '68991e5e081b522d406e555ebc9b281653e4c5e3f44a7bdac1b39cbfd985f5f5a:2:{i:0;s:5:"_csrf";i:1;s:32:"nvQgW5K4zI8AcotUyr0QWbBLOPvohWFR";}',
    'topics-session' => '1792043665.282.16940.966736|d197bbbd1d400bd72372bc93068ad169',
];

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