Title: FACEBOOK PIXEL has multiple problem diagnosis errors Last modified: July 26, 2021 --- # FACEBOOK PIXEL has multiple problem diagnosis errors * Resolved [austinchui](https://wordpress.org/support/users/austinchui/) * (@austinchui) * [4 years, 9 months ago](https://wordpress.org/support/topic/facebook-pixel-has-multiple-problem-diagnosis-errors/) * FACEBOOK PIXEL has multiple problem diagnosis errors, My conversion API is automatically set using the Facebook for WooCommerce plugin. The Pixel event is an “event setting tool” visualized by FACEBOOK But now the following 5 warnings have appeared respectively 1.Server Sending Invalid Match Key Parameters for ViewContent Event- Your server is sending an invalid ip_address parameters value for your ViewContent event. This may be because there was an error in the parameter value. This may cause issues with the attribution and delivery optimization of ad campaigns that are using this event. * 2. The AddToCart event lacks some duplicate item deletion parameters- You need to send AddToCart events through the pixel and conversion API at the same time, but these events cannot complete the deduplication process correctly because there are not enough such events to receive the event_id parameter. For the event instance without the event_id parameter when transmitted, the duplicate item deletion procedure cannot be completed. This may cause problems with event measurement, attribution conditions and advertising optimization for all advertising campaigns optimized for this event. * 3. The Purchase event lacks some duplicate item deletion parameters- You want to send Purchase events through the pixel and conversion API at the same time, but these events cannot complete the deduplication process correctly because there are not enough such events to receive the event_id parameter. For the event instance without the event_id parameter when transmitted, the duplicate item deletion procedure cannot be completed. This may cause problems with event measurement, attribution conditions and advertising optimization for all advertising campaigns optimized for this event. * 4. The ViewContent event lacks some duplicate item deletion parameters- You want to send ViewContent events through the pixel and conversion API at the same time, but these events cannot complete the deduplication process correctly because there are not enough such events to receive the event_id parameter. For the event instance without the event_id parameter when transmitted, the duplicate item deletion procedure cannot be completed. This may cause problems with event measurement, attribution conditions and advertising optimization for all advertising campaigns optimized for this event. * 5. Receive the same event number from multiple event instances- You want to transmit the same event number for multiple instances of the ViewCategory event. The event number is a unique identification code that can be used to delete duplicate items for the same event from the pixel and conversion API to avoid double counting. To ensure that Facebook can accurately calculate events, each unique event instance needs to have its own unique event number. This may cause problems with event measurement and attribution conditions for advertising campaigns. * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Ffacebook-pixel-has-multiple-problem-diagnosis-errors%2F%3Foutput_format%3Dmd&locale=en_US) to see the link]_ Viewing 2 replies - 1 through 2 (of 2 total) * [Austin M – a11n](https://wordpress.org/support/users/apmwebdev/) * (@apmwebdev) * [4 years, 9 months ago](https://wordpress.org/support/topic/facebook-pixel-has-multiple-problem-diagnosis-errors/#post-14703802) * Hi [@austinchui](https://wordpress.org/support/users/austinchui/)! Based on your error messages, this seems to be a known bug that has been reported to Facebook for WooCommerce developers. You can learn more about this bug here: [https://github.com/facebookincubator/facebook-for-woocommerce/issues/1777](https://github.com/facebookincubator/facebook-for-woocommerce/issues/1777) * The recommended steps for getting around this issue are the following: * 1) Check that your pixel is connected. You can troubleshoot pixel issues using the Facebook Pixel Helper Chrome extension. 2) Make sure there aren’t any browser extensions blocking Facebook user agent and IP addresses 3) Enable debug logging for the Facebook plugin on your site, and see if you are getting any obviously errors * If that doesn’t help, I recommend following the GitHub bug report above for any updates on how to fix the issue or when a fix will be released for it. * [Augustus – a11n](https://wordpress.org/support/users/augustuswp/) * (@augustuswp) * [4 years, 9 months ago](https://wordpress.org/support/topic/facebook-pixel-has-multiple-problem-diagnosis-errors/#post-14728544) * We haven’t heard back from you in a while, so I’m going to mark this as resolved– we’ll be here if and/or when you are ready to continue. Viewing 2 replies - 1 through 2 (of 2 total) The topic ‘FACEBOOK PIXEL has multiple problem diagnosis errors’ 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/) * 2 replies * 3 participants * Last reply from: [Augustus – a11n](https://wordpress.org/support/users/augustuswp/) * Last activity: [4 years, 9 months ago](https://wordpress.org/support/topic/facebook-pixel-has-multiple-problem-diagnosis-errors/#post-14728544) * Status: resolved