Hi @paolo8913
Thanks for sharing the requested information above.
The fatal error logs are pointing to your theme PhyGioielli.
Since this is a third-party plugin that we don’t provide support for based on our Support Policy, I recommend that you reach out to the developers of the plugin for further assistance. They will be better equipped to help you resolve any issues you’re experiencing with the plugin.
As for the SSR, I only see that you have Outdated Templates: ?
. Please update outdated templates on your site by following our guide here: Fixing Outdated WooCommerce Templates
For us to investigate this further, can you please try to switch to the default Storefront theme and only WooCommerce and Facebook for WooCommerce plugins are enabled and see if this add to cart event is already working?
If so, then this kind of problem is usually caused by your theme or a third-party plugin present on your site. We can run a conflict test to verify this. I’d recommend cloning your site to a staging environment and performing the tests described on this guide without modifying your live site or impacting customers. Many hosts provide staging facilities, so it’s worth checking in with them. It’s also possible to do it using the free WP Staging plugin.
If this was caused by a third-party plugin present on your site, it would be best to reach out to the developers for further assistance here.
Let us know how it goes!