Issues with string translation

Hi,

I can’t translate one of the strings (products). It should be a woocommerce string.
Here is the link to my website: http://umbertoto.ru/%D0%BC%D0%B5%D0%BD%D1%8E/

I am using a loco translate plugin, and there is also an issue, when I click save button after translation, I am receiving an internal error message.
https://snag.gy/SqRITf.jpg

https://wordpress.org/plugins/loco-translate/