Title: Diagnostic problems AddToCart event
Last modified: December 21, 2020

---

# Diagnostic problems AddToCart event

 *  Resolved [Ken](https://wordpress.org/support/users/xewl/)
 * (@xewl)
 * [5 years, 5 months ago](https://wordpress.org/support/topic/diagnostic-problems/)
 * I have two up-to-date WooCommerce< instances which use the FB for WooCommerce
   plugin (2.2.0) – Both Pixels tend to show diagnostic problems for the AddToCart
   event.
    Both carts are “Stock” WooCommerce carts. There are no related errors
   in the WooCommerce status page.
 * They both show the following diagnostic messages:
    – Server Sending Invalid Match
   Key Parameters for AddToCart Event – Dezelfde event_id ontvangen voor vele gebeurtenissen(
   Same event_id received for many events)
 * They both seem to happen pretty regularly, as marking them as solved doesn’t 
   help.
    -  This topic was modified 5 years, 5 months ago by [Ken](https://wordpress.org/support/users/xewl/).

Viewing 3 replies - 1 through 3 (of 3 total)

 *  [aaronissac](https://wordpress.org/support/users/aaronissac/)
 * (@aaronissac)
 * [5 years, 5 months ago](https://wordpress.org/support/topic/diagnostic-problems/#post-13817758)
 * Yes im facing the exact same problem.
 *  [Austin M – a11n](https://wordpress.org/support/users/apmwebdev/)
 * (@apmwebdev)
 * [5 years, 5 months ago](https://wordpress.org/support/topic/diagnostic-problems/#post-13844766)
 * We’ve recently reached out to Facebook directly to try to get some clarity regarding
   the “Invalid Match Key” warning.
 * While no specific resolution has been provided, we do now know this from their
   replies:
 * – This warning only occurs with server to server events (added in Facebook for
   WooCommerce v2.0)
    – It can be the result of a platform issue – which wouldn’t
   be fixable from within the plugin – Facebook will not share more specific event
   data for privacy reasons – There aren’t any events in the plugin’s logs with 
   missing user_agents or ip_addresses
 * Facebook has assured us that they’re looking into providing more information 
   for this error in a future release, such as showing the affected URL and the 
   parameter and what is wrong with it. They did also mention, however, that even
   with some additional details, it would not likely be able to be resolved by the
   plugin, as it can be at the platform level.
 * They weren’t able to pass along an expected date for release, though did mention
   that they usually see some features/improvements added after the December holidays.
 * It seems that at this moment, we’ll need to wait for this release before looking
   at the Invalid Match Key parameter further.
 *  [Austin M – a11n](https://wordpress.org/support/users/apmwebdev/)
 * (@apmwebdev)
 * [5 years, 5 months ago](https://wordpress.org/support/topic/diagnostic-problems/#post-13869239)
 * We haven’t heard back from you in a while, so I’m going to mark this as resolved.
   Feel free to start a new thread if you have any further questions!

Viewing 3 replies - 1 through 3 (of 3 total)

The topic ‘Diagnostic problems AddToCart event’ is closed to new replies.

 * ![](https://ps.w.org/facebook-for-woocommerce/assets/icon.svg?rev=3469606)
 * [Meta for WooCommerce](https://wordpress.org/plugins/facebook-for-woocommerce/)
 * [Support Threads](https://wordpress.org/support/plugin/facebook-for-woocommerce/)
 * [Active Topics](https://wordpress.org/support/plugin/facebook-for-woocommerce/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/facebook-for-woocommerce/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/facebook-for-woocommerce/reviews/)

## Tags

 * [addtocart](https://wordpress.org/support/topic-tag/addtocart/)
 * [Diagnostic](https://wordpress.org/support/topic-tag/diagnostic/)
 * [event](https://wordpress.org/support/topic-tag/event/)

 * 3 replies
 * 3 participants
 * Last reply from: [Austin M – a11n](https://wordpress.org/support/users/apmwebdev/)
 * Last activity: [5 years, 5 months ago](https://wordpress.org/support/topic/diagnostic-problems/#post-13869239)
 * Status: resolved