Muliple email addresses for client

I need to add multiple email addresses for the client when emailing invoices. I used to be able to put a comma between each one and that worked but it has stopped working recently. I know get a warning when I try to email an invoice with more than one email address.

Original topic with solution:
https://community2.invoiceplane.com/t/topic/6256

A post was merged into an existing topic: Client with muliple email addresses