PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791238217',
];

$_COOKIE = [
    '_csrf' => '745eda9a160a9d6d7f0b36ac7bfe6d3722ca90c3aed0add810a4bc561ae31e7da:2:{i:0;s:5:"_csrf";i:1;s:32:"XXHShGrL59bFiQ8zOuZfdleE5o482_aM";}',
    'PHPSESSID' => 'p8tf8l50sj8oiuv3p3q5vbb542',
    'topics-session' => '1791432234.543.16482.341423|d197bbbd1d400bd72372bc93068ad169',
];

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