PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1790963126',
];

$_COOKIE = [
    'topics-session' => '1790971328.08.16490.945682|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'eoi9hevs54het8g3eq2jbu7ur2',
    '_csrf' => '506e1a02694bdff0ba66f760b7786543deb2905e8027aefb9fd2e057fe595588a:2:{i:0;s:5:"_csrf";i:1;s:32:"vnqA_KfbpMbXP4ysisRq4Hz43JFtFbrh";}',
];

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