My invoices have gone missing from the app on the phone,when I log in on the desktop it just freezes,any advice please ?

I can help you with resolving the error you're having when trying to access your invoices, pnolan. 

The problem you're having with your invoices in the mobile app and browser can be caused by the piled-up cache. 

To resolve this, you can tap the Clear Data option in the Storage section of your mobile phone to reset the app to its default state.

Here's how to clear app cache or data storage if you're using an Android:

1. Open your phone's Settings app.
2. Tap Apps & notifications and click on See all apps in the app Storage.
3. Select Clear storage or Clear cache. If you don't see "Clear storage," tap Clear data.

For IOS:

1. Open Settings swipe down and tap Safari.
2. Swipe down again and select Clear History and Website Data, and click it once again to confirm.

On your desktop, sign in to your QBO account using a private browser. This helps isolate the issue since it doesn’t store data in the cache. Here are the following keyboard shortcuts: 

• Safari: Command + Shift + N
• Mozilla Firefox: CTRL + Shift + P
• Google Chrome: CTRL + Shift + N
• Microsoft Edge: CTRL + Shift + N

If it works, here's how to clear cache and cookies to fix issues when using QuickBooks Online. Restart your browser right after. You can also try to log in to your account using other supported browsers (Firefox, Google Chrome, Safari, Microsoft Edge) if the steps above didn’t work.

Once you receive their payment, here's how to record them in your account: Record invoice payments in QuickBooks Online. 

Let me know if you need further help with your invoices. I'm always glad to help in any way I can. Have a wonderful day!