Fatal error: Call to undefined function is_product_category()

Last update: 23 June, 2016

The error:

Fatal error: Call to undefined function is_product_category() in /PATH_TO_WORDPRESS/wp-content/plugins/wpseo-woocommerce/wpseo-woocommerce.php on line ###

This error appears when the Yoast WooCommerce SEO plugin is installed and active but the required companion plugin, WooTheme’s ecommerce plugin called WooCommerce, is not installed.

A
Please install and activate WooTheme’s ecommerce plugin called WooCommerce.
B
If you are not using WooCommerce, please deactivate the Yoast WooCommerce SEO plugin.

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