PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1790918937',
];

$_COOKIE = [
    '_csrf' => '0e0ccb49dc429c2c57f6e8ffa0d84f51a39e6acda2ae4b81adbce9d6b813750ba:2:{i:0;s:5:"_csrf";i:1;s:32:"a5Biodmu08oIN5xrt-kA4fZRzXMzWamY";}',
    'topics-session' => '1790966370.48.16855.670602|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'qmikvf3ufvrtvda5gj0v9m34j4',
];

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