The error is gone, but for some reason discount percentage is not calculated.
Please see attached (still shows 0%)
Also – just to make sure that I did the right thing:
1. I saved wp-content/themes/kleo/lib/plugin-woocommerce/config.php as config.php.orig
2. Created new config.php in the same dorectory and copied all the content to this files from the one in your link.
Thanks
Elijah