Embedded Form: Invoices aren't being sent to our clients

I just noticed that our invoices aren't being sent to our clients after applying the new iframe code on our website last night.

Can you please let me know how I can fix this?

The simple invoice checkmark box was unchecked after I updated my code.

I put the check mark back in and now it's working fine.

I'll let you know if the problem comes back.

Thanks.