Software error

I'm here to help you issue your invoices in QuickBooks mobile app, @Milday Properties.

We can perform some troubleshooting steps to fix this. There are times that the browser is full of frequently accessed pages, thus causing some unusual responses. In this case, we can clear the apps cache files. Doing so helps in fixing any sorts of errors in the system. Here’s how:

1. Open your QuickBooks app.
2. Go to the Help menu at the top of the screen.
3. Click the Rest App Data option on the drop-down selection.

If the issue persists, uninstall and reinstall the software. This is to ensure you get the most recent version of the application. 

In the meantime, you'll want to enter invoices in your QBO account using a web browser. For detailed steps, you can utilize this link: Create invoices in QuickBooks Online.

I'm also sharing this link to guide you on how to use the QuickBooks mobile app to receive an invoice payment from your mobile device: Receive an invoice payment.

I'm looking forward to hearing from you. Get back to me if any additional questions about managing invoices. Have a good one.