Hi Alexbirnoud,
Thanks for your message. I will be happy to assist.
“Server Sending Invalid Match Key Parameters for PageView Event”
– Is this happening when you are testing events or with events coming from your website users? It is unlikely to happen when you use the Test Events feature with Facebook.
This is usually caused by bots visiting your site or users having a browser extension that might block the browser pixel from firing—something like an anti-tracking browser add-on. In this case, you can just ignore the warning since there is not much you can do to control the user’s browser extensions.
“I also see some of the browser events duplicated :”
– If that event is not getting the server event also added, that could indicate there is another plugin on your site firing events. You can check with the Facebook Pixel helper extensions for more troubleshooting. Another option is to look through your plugin/theme to see if any other events are getting fired.
I hope that answers your questions. If there is anything else, don’t hesitate to get back to us.
All the best.