PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791178787',
];

$_COOKIE = [
    '_csrf' => '52a1429cbf1cf89dc9297262881638b4f77432aadff379634c4d87beb8e83601a:2:{i:0;s:5:"_csrf";i:1;s:32:"hZ2IaMRWuXsTSioqjY_uo3vay5zywbfZ";}',
    'PHPSESSID' => '2btqrmhv72f1ekrh42bgfhhbf2',
    'topics-session' => '1791461941.16.16901.288377|d197bbbd1d400bd72372bc93068ad169',
];

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