PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791208104',
];

$_COOKIE = [
    '_csrf' => '535439ab02a5e4210fa495ac25da470e3cbef406f2d9a67c73ddb6734c0b218ea:2:{i:0;s:5:"_csrf";i:1;s:32:"Vpl1WELDE6xxx37PgrRx1rqlHq1KtZY2";}',
    'topics-session' => '1791381840.817.16901.846641|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'pu3eb424fvksfl88rm7flh4d50',
];

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