Invoice not updating after moving to ITarian

After choosing to update to the ITarian platform, I am not able to update any invoices. I get an error message that says mandatory fields are blank. I am trying to update the fact that the customer paid the invoice.

I am unable to create invoices as well.

Hi @aoit
This specific issue with the invoices has been reported already to our product development team. A fix is scheduled to be rolled out with the December update to the C1/Itarian platofrm.