php - Cannot add item to cart in magento with two store -

Thanks for reading.

I have a magenta site that has two stores. retail and wholesale.

I am not able to show blank pages to any item in the cart.

This error is:

  Fatal error: Call the undefined method Mage_Weee_Helper_Data :: setstore () in /var/www/vhosts/club27clothing.com/club27clothing.com On the line at /app/code/core/Mage/Weee/Model/Total/Quote/Weee.php 93  

compilation is disabled, the cache is cleaned and refreshed Magento version 1.8 and community The version is.

Can anyone help me with this error? Thank you.

Sort it yourself This file or module differs from 1.8.1 to 1.8.0. I manually uploaded some core files by mistake and I came back to 1.8.0 because it was before the problem was fixed. Thank.s