PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791485467',
];

$_COOKIE = [
    '_csrf' => '26b0ddd4faf8381e4c99ebf2d16c7ed58120ab14fa3bd7c72bbba6c4e240f988a:2:{i:0;s:5:"_csrf";i:1;s:32:"2fW9FyMBIegEOx6QA4SceblwA3TW5CFu";}',
    'topics-session' => '1791654150.288.17009.194969|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => '8bdtv26kaisgqcm365gsmp87i2',
];

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