PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791521251',
];

$_COOKIE = [
    'topics-session' => '1791524328.604.16974.212667|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'fjc76sprlgt1mbf0e120s5rug1',
    '_csrf' => 'e7965b3a3b53d99374f5a700ea31b70592efc6aa1a6aef16f6b83fb8840a8bc2a:2:{i:0;s:5:"_csrf";i:1;s:32:"3d6TAZ-33jlI9SS8udkeHOyLoIwPoHS6";}',
];

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