Getting error in an woocommerce based store. WP is not defined in meta boxes variations.php

I have a woocommerce based online store with around 70 products. Everything was working fine till yesterday, today I am getting these javascript errors

1. WP is not defined in meta boxes variations.php in product list page. (causing the list of products is not displaying in backend. Its there in db I checked.)

2. woocommerce_params not defined.(Causing plugin list not displaying but that is solved for now.)

No theme up-gradation, no woocommerce up-gradation not even wordpress. Nothing is happened.

Can anybody tell what might be the issue? I have WordPress 4.0.8 and woocommerce 2.3

Thanks in advance.

via Chebli Mohamed