To resolve the issue of your Budget app displaying a white screen after logging in for the first time, you can follow these steps:

1. Restart Your Device: Begin by rebooting your computer. This can often resolve temporary glitches that cause apps to misbehave.

2. Check for Updates:
- Ensure your app is updated to the latest version. Open the Microsoft Store, go to 'Downloads and updates', then click on 'Get updates'.
- Also, verify that your Windows operating system is up to date by going to Settings > Update & Security > Windows Update.

3. Clear Cache:
- If your app allows it, clear the app's cache. You may find this option in the "Storage" settings of the app.
- Alternatively, you can use the following method: Go to “Settings” > “Apps” > “Apps & Features", find the Budget app, click on it, and choose ‘Advanced options’ where you can find options to reset or repair the app.

4. Reinstall the App:
- Uninstall the Budget app by going to “Settings” > “Apps” > “Apps & features”, then locating the Budget app and selecting 'Uninstall'.
- After uninstalling, download and reinstall the app from the Microsoft Store.

5. Run the App Troubleshooter:
- Go to Settings > Update & Security > Troubleshoot > Additional troubleshooters.
- Select 'Windows Store Apps' and run the troubleshooter to diagnose and automatically fix issues with the app.

6. Check Internet Connection: Make sure your internet connection is stable. A weak connection may prevent the app from loading properly.

7. Disable Extensions/Add-ons:
- If you have any security software, VPN, or firewall enabled, disable them temporarily as they may interfere with the app's connection.

8. Check System Resources: Confirm that your device has sufficient memory and CPU resources by opening the Task Manager and checking the performance tab. If memory usage is high, try closing unnecessary applications.

If after following these steps the issue persists, consider visiting community forums or support pages related specifically to the Budget app for further assistance - learn more - learn more.