Hello!
(Woodmart = brilliant theme, respect!)
How does this problem happen =>
WordPress 4.9.6 / Woodmart 2.4.0 / Woodmart default plugins without any third-party plugins
1) I installed “Loco Translate plugin” and did everything as in a training video (https://xtemos.com/docs/woodmart/translation/)
2) I took /wp-content/themes/woodmart/languages/woodmart.pot and translate it using Poedit (default Pre-translate)
3) Then I replaced woodmart-ru_RU.mo and woodmart-ru_RU.po in /wp-content/languages/themes/ on new files.
After this actions all translated OK, but some widgets stop working (for example WOODMART WooCommerce Layered Nav).
In developer console i have error message:
https://imgur.com/a/vlqQDnd