PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1790966323',
];

$_COOKIE = [
    'topics-session' => '1790985967.657.16974.742886|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'tsh624s08ssseauqh0pnnnasr7',
    '_csrf' => '437a8a36cc7df0066b0f8240f55a4097f40ed531e79f086e6f44b6b0935fe0dda:2:{i:0;s:5:"_csrf";i:1;s:32:"m_rMTq-UjevYO1g37aQFJC-lWTJVGk6Q";}',
];

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