PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791546111',
];

$_COOKIE = [
    'topics-session' => '1791767032.331.16975.888174|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'f0n6q8hd749ret9eh17877neg3',
    '_csrf' => '1259151bf224c98a55cc61839773b2182292e788fed8bb1f434ba20a1bfce007a:2:{i:0;s:5:"_csrf";i:1;s:32:"6NzWkcmvjGUjq4lvnRPtIDD2BDLJHyPy";}',
];

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