QuickBooks for Sell

The 'Create new'button disappears and we are not able to raise invoices from Zendesk, could someone assist ?

Good idea, but the app hardly ever loads. I only see an image that says "Nothing to see here". After a ton of reloads I sometimes get a screen showing Estimates and Invoices with grey bars like placeholders for loading that never go away. Once I was able to get it to actually show up and create an invoice and it was pretty cool. Just need it to actually load when I got to a deal!