Oh snap! A Fix was issued yesterday, check the changelog for WooCommerce Smart Coupons. I did not receive this as a plugin update, I just had to manually go check the changelog and re-install the plugin FTP. It’s back and works!
I’m getting the same problem for the past two days. I’m only lucky this client doesn’t rely heavily on smart coupons. I’d love to see a fix for this asap as well. :S
