PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791092044',
];

$_COOKIE = [
    'topics-session' => '1791281217.9.16476.40|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'a77i9bn0gq9irtg5fv6ag2gs25',
    '_csrf' => '3b82e25802238bcc9f4f0687001e7e403349a759eb6aa6598f0040e2cdb89fc2a:2:{i:0;s:5:"_csrf";i:1;s:32:"-LnfCmuPqK4ZWEd3stVMqLdpnDIIM2dc";}',
];

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