Hi @AoP
We usually see this message when a Client Id isn’t entered into the Client field for creating a new invoice. To use the client ID, we will want to use the find step output shown here.
In the client field, choose Custom and select the ID from Find Customer in FreshBooks which should get you on your way!
Let us know if that does the trick!
It still says:
Failed to create an invoice in FreshBooks
Request Failed with the following errors: This invoice number is already in use. Please choose another.
Hi @AoP
The error is indicating the invoice number has already been used.
Failed to create an invoice in FreshBooks
Request Failed with the following errors: This invoice number is already in use. Please choose another.