PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1765971017',
];

$_COOKIE = [
    '_csrf' => '8374e742c5374aa6902ebf1096102c401377ca21c08172b965d9841038dc5e0ca:2:{i:0;s:5:"_csrf";i:1;s:32:"avx1TKpCThGz8fg6_1tzHVM0bVMdwAcR";}',
    'topics-session' => '1765976730.958.16079.756401|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'r5rdp3bk0ssjsi5f3tdv78mn66',
];

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