Thanks for letting us know! We definitely recommend raising a case via the Digital assistant in Solo, it'll connect you with our team and we'll continue working hard on finding the source of the problem.
As a workaround in the meantime, you'll be able to use the Share button to send an invoice via an external email or messaging app. This'll make sure you can continue sending invoices over the weekend, and we'll pick up our investigation with priority on Monday morning.
Drop us a line in the Solo app and we'll pick up the conversation on the other side ☺️