Title: Error when using Gravity Forms Product plugin
Last modified: September 5, 2019

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# Error when using Gravity Forms Product plugin

 *  [AJD](https://wordpress.org/support/users/ajd/)
 * (@ajd)
 * [6 years, 8 months ago](https://wordpress.org/support/topic/error-when-using-gravity-forms-product-plugin/)
 * I am using the Gravity Forms Product add-on ([https://woocommerce.com/products/gravity-forms-add-ons/](https://woocommerce.com/products/gravity-forms-add-ons/))
 * When I use their class to hide items from the cart and invoices it triggers a
   fatal error with PDF invoices: (The class is added to a gravity form field to
   hide that field: wc-gforms-hide-from-email)
 *  An error of type E_ERROR was caused in line 55 of the file /home/MYSITE/public_html/
   wp-content/plugins/flexible-shipping-ups/classes/order-meta.php. Error message:
   Uncaught ArgumentCountError: Too few arguments to function Flexible_Shipping_UPS_Order_Meta::
   display_meta_key(), 1 passed in /home/MYSITE/public_html/wp-includes/class-wp-
   hook.php on line 286 and exactly 3 expected in /home/MYSITE/public_html/wp-content/
   plugins/flexible-shipping-ups/classes/order-meta.php:55 Stack trace: #0 /home/
   MYSITE/public_html/wp-includes/class-wp-hook.php(286): Flexible_Shipping_UPS_Order_Meta-
   >display_meta_key(‘_gf_email_hidde…’) #1 /home/MYSITE/public_html/wp-includes/
   plugin.php(208): WP_Hook->apply_filters(‘_gf_email_hidde…’, Array) #2 /home/MYSITE/
   public_html/wp-content/plugins/woocommerce-gravityforms-product-addons/inc/gravityforms-
   product-addons-order.php(77): apply_filters(‘woocommerce_ord…’, ‘_gf_email_hidde…’)#
   3 /home/MYSITE/public_html/wp-includes/class-wp-hook.php(286): WC_GFPA_Order-
   >custom_order_item_meta(64538, Object(WC_Order_Item_Product), Object(WC_Product_Simple))#
   4 /home/MYSITE/public_html/wp-includes/class-wp-hook.php(310): WP_Hook->apply_fil

Viewing 1 replies (of 1 total)

 *  [maximvanmaanen](https://wordpress.org/support/users/maximvanmaanen/)
 * (@maximvanmaanen)
 * [6 years, 6 months ago](https://wordpress.org/support/topic/error-when-using-gravity-forms-product-plugin/#post-12110273)
 * Hello AJD,
 * Apologies for the late reply but are you still experiencing this issue? If so,
   we would like to provide a solution if possible.

Viewing 1 replies (of 1 total)

The topic ‘Error when using Gravity Forms Product plugin’ is closed to new replies.

 * ![](https://ps.w.org/woocommerce-pdf-invoices/assets/icon-128x128.png?rev=1128583)
 * [Invoices for WooCommerce](https://wordpress.org/plugins/woocommerce-pdf-invoices/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/woocommerce-pdf-invoices/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/woocommerce-pdf-invoices/)
 * [Active Topics](https://wordpress.org/support/plugin/woocommerce-pdf-invoices/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/woocommerce-pdf-invoices/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/woocommerce-pdf-invoices/reviews/)

 * 1 reply
 * 2 participants
 * Last reply from: [maximvanmaanen](https://wordpress.org/support/users/maximvanmaanen/)
 * Last activity: [6 years, 6 months ago](https://wordpress.org/support/topic/error-when-using-gravity-forms-product-plugin/#post-12110273)
 * Status: not resolved