PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791424697',
];

$_COOKIE = [
    '_csrf' => '17e19ccfd60b6413b8e6c93349177e398ad3c5a317df8dac36c48471ea848784a:2:{i:0;s:5:"_csrf";i:1;s:32:"F0o406rOSGQUZ4PpCyOffpLat63W9CPK";}',
    'topics-session' => '1791525809.937.16940.366782|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'ufs8nrmmvte6epbvjf8grjoco0',
];

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