I can help you with resolving the error you're having with your categories and bank accounts while using the QuickBooks app, @tracyanen.

First, make sure to use the latest version of the QuickBooks Online (QBO) mobile app. Try to check if you can see your bank accounts and categorize your transactions. If the error persists or you already have the latest app, clear your app cache. 

It's possible that the piled-up cache in your application caused this unusual behavior. Clear your data or cache for this app in the Storage section of your mobile phone to reset the app to its default state.

To resolve this, you can hit 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 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, click it once again to confirm.

See this article for more information about going to your bank transactions and categorizing them using your mobile app: Categorize bank transactions in the QuickBooks Online app.

Check out this article to solve the common error in the mobile application: Common Errors in the Mobile App.

If you need any additional assistance with your bank accounts, categories, or anything else, let me know by leaving a reply below. Enjoy the rest of your day!