I have a tasks that are asigned to projects that I need to bill to clients. When ever I select the tasks I want to invoice by checking the box and then I click invoice at the top. When I do this it takes me to the invoice page but it doesn’t actually generate the physical PDF invoice at the bottom on the invoice page. This issue only happens with tasks being billed. Reoccuring invoices generate correctly, if I create an invoice the PDF at the bottom is generated correctly. Its only when I create an invoice with tasks.
If I create an invoice with the tasks even through the physical invoice isn’t created, the tasks are marked at invoiced.
I fixed the issue…. In settings if you go to design, I found two custom fields located under product fields > tasks. I deleted these two field since I don’t use them and then all the themes started working correctly.