Hi! I understand that the Avis app on your Windows device using WebKit is showing a dark screen and won’t open properly. Let’s work through some steps to help get it working again.

First, can you tell me if you have already tried updating the app or restarting your device? Also, is this issue happening right after opening the app, or after you try to log in or access a particular feature?

In general, for this kind of dark or black screen issue, here’s a step-by-step approach:

1. Restart your computer – Sometimes a simple reboot can clear temporary glitches in the app or browser environment.

2. Clear app cache and data – Although Windows apps differ, if you are using a Progressive Web App (PWA) or through a browser, try clearing your browser’s cache and cookies related to the Avis app site.

3. Update the app or browser – Ensure your Avis app is updated to the latest version. Since you’re on WebKit on Windows, confirm your browser is updated too.

4. Reinstall the app – If you have the app installed as a program, uninstall and reinstall it to clear any corrupted files.

5. Check Internet connection – Verify your network is stable, as app loading issues sometimes relate to connectivity.

If those don’t help, you might want to try opening the app from a different browser or device temporarily to see if the issue persists there.

Let me know which of these you have tried, and if the app actually crashes or just stays on a dark screen with no response. This will help me guide you with more specific fixes!