yii2: i18n plural is not working on production

What steps will reproduce the problem?

In my view, I got:

return Yii::t('nfy', '<strong>{n,plural,=0{No orders} =1{One order} other{# orders}}</strong> need to be fulfilled', ['n' => $this->count]);

In messages (nfy.php) I have

'<strong>{n,plural,=0{No orders} =1{One order} other{# orders}}</strong> need to be fulfilled' => '<strong>{n,plural,=0{Нет заказов} =1{Один заказ} one{# заказ} few{# заказа} many{# заказов} other{# заказа}}</strong> которые нужно отправить', 

On a local machine, translation is applied correctly. However, on a production server, I get a raw translation string (this is what gets rendered after Yii::t):

{n,plural,=0{Нет заказов} =1{Один заказ} one{# заказ} few{# заказа} many{# заказов} other{# заказа}} которые нужно отправить

What is the expected result?

It should be like 4 заказа которые нужно отправить

Additional info

Q	A
Yii version	2.0.10
PHP version	5.5.38
Operating system	CentOS