Why does my mobile screen lock up when I try to open an invoice?

I want to ensure this is taken care of, help8.

Let's start by refreshing the app to fix some data issues. You can follow the steps below depending on your phone's operating system.

For the IOS version:

1. Go to the Menu icon and tap Help & Feedback.
2. Select Refresh Data.
3. If you get a prompt message, "Caution. If there was a problem getting your latest QuickBooks Online data, you can refresh it now. It may take a few minutes."
4. Tap Refresh to confirm.

For Android:

1. Go to the Menu icon, then tap More Options ⋮.
2. Click Settings, then Refresh Data.
3. Select YES to confirm.

If you get the same result, I suggest uninstalling and reinstalling the app.

Additionally, have you tried logging into your account on a web browser? If not, I suggest doing so and opening an invoice from there. Here's how:

1. Go to the Sales menu and click Invoice.
2. Choose the transaction you want to open.

Furthermore, check this guide to help personalize your invoices: Customize invoices.

Let me know if you need further guidance managing invoices in QuickBooks. I'm always here to help. Take care.