PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791442279',
];

$_COOKIE = [
    '_csrf' => '05700b4307c1998e82f5a82a6d7e803634401a6796dfa57cc56148e653c34475a:2:{i:0;s:5:"_csrf";i:1;s:32:"hp1vdQsbhElQVeTQA8OJsJyWqAJ-mh2Q";}',
    'topics-session' => '1791458189.061.16940.415464|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => '9fk2vp8hhr0d69tmslrlgljmg7',
];

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