PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1766051786',
];

$_COOKIE = [
    'PHPSESSID' => 't3teo84tibcmtkk1ruaua49lg4',
    'topics-session' => '1766104297.618.16013.910028|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => '616b738e91f1c3783a2092556ddec2cbebc30346a53849790bcac8df00435d2da:2:{i:0;s:5:"_csrf";i:1;s:32:"sqHy9oVFQ-LZerewklKTlIr2k88-zNc5";}',
];

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