Resolve issues with Facebook Pixel

We have Facebook Pixel installed on our website, and we are running multiple campaigns. The issue we are having is performance has dropped, and we are getting errors on our Add to Cart data source.

Here is the error:
AddToCart Event missing some deduplication parameters

We have our Facebook Pixel and data source synced to Shopify. But clearly something is not set up correctly.

This project involves resolving the above mentioned issue, and also improving our event match quality score. Currently the score is at 4.6 for most of our events. We'd like this score to be improved.