Not able to send invoices from iPad or iPhone

Two days ago I was able to send invoices from my iPad using the Sage Accounting app. As of yesterday I get “Oops No Service” notification when I save an invoice.

I’ve tested using wifi (full bars) and Cellular.

The app is still communicating with the cloud because I write invoices on a desktop as well though the day. And those invoices show up on my phone as sent.

Thanks,

Nick