I see everybody seems to be having trouble with the Google app plug in. No items appear in the invoice window, no connection to the calendar.

Hi, scottyhucker.

We have limited access to your third-party apps. I suggest contacting the App's Support Team to check if they have maintenance. A browser-related issue can also be the cause why you're having issues with Google plugins. We can verify that by logging in to QuickBooks Online through a private browser and create the invoice from there. 

If you're able to see items in your invoices and the calendar is connected, you can switch back to the main browser and clear the cache. You can also use other supported browsers to get rid of these kinds of issues. 

Keep me posted on how this works. If you have other concerns, please don't hesitate to go back to this thread.