mapping the quantity_to_sell_on_facebook field properly

After Facebook’s change this summer forcing everyone to use FB checkout instead of purchasing on the merchant’s website, our entire catalog has a stock of 0 in our FB catalog.

I read this older thread on this forum and am trying to fix this by following the solution outlined there, and I also added the quantity_to_sell_on_facebook field in your plugin’s field mappings.

But now when I try to refresh the XML feed your plugin seems to hang–it just says “processing 33%” forever.

Any idea what might be going on here?

Here’s the new field mappings I added:

And here’s the rule I created (so products that don’t have WooCommerce stock management activated–they’re just marked as “in stock”–don’t end up with a quantity of 0 in the Facebook catalog):

The page I need help with: [log in to see the link]