PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791403962',
];

$_COOKIE = [
    '_csrf' => '2ba4cd0d6138acd376e6a49bdb21d874a54adcd8c3219c6d36105d049a33d63aa:2:{i:0;s:5:"_csrf";i:1;s:32:"eepabo0HjAiM5jxu_mFgl7AYXQwmXaDN";}',
    'PHPSESSID' => 'nss89mt2a1jj611405l7do53s0',
    'topics-session' => '1791491663.935.16615.530953|d197bbbd1d400bd72372bc93068ad169',
];

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