PHP Core Warning – yii\base\ErrorException

$_GET = [
    'sort' => 'amount',
    'page' => '6',
];

$_COOKIE = [
    'PHPSESSID' => 'frj35lr7vphtm8k5fb5jemqat6',
    'viewed' => '5e753659c1fc24304951589541cf47e74c23ee84e75d099e3a8ea1341f3f24daa:2:{i:0;s:6:"viewed";i:1;a:2:{i:0;i:132719;i:1;i:81907;}}',
    '_csrf' => 'e31cfc198ac9fd505ac161832cebb4e5418db42e1a8e9d44fac0a1f7483e6820a:2:{i:0;s:5:"_csrf";i:1;s:32:"GwYXhZEdXM2aWernY_Rti7VrJgWcLRlV";}',
];

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