Hello! I see you're having a tricky situation with the Rave app chat: it doesn't work without VPN, but when you connect through VPN, you get a black screen. Let’s dive into this and see what we can do.

First, could you tell me a bit more about your VPN setup? For example:
- Which VPN service or app are you using?
- Is the VPN connected to a specific country or server?
- Have you tried switching VPN servers to see if that changes the black screen issue?

Meanwhile, I’ll provide some general steps that have helped others who faced similar issues on Android (your device is WebKit with Android 14):

1. Clear the Rave app cache and data: Sometimes old cache causes display glitches like black screens.
- Go to Settings > Apps > Rave.
- Tap Storage & cache.
- Clear cache first, then try the app.
- If no improvement, clear storage/data (note: this will log you out).

2. Check permissions: Ensure Rave has necessary permissions like storage, network access, and overlay permissions. Without these, video or chat might not display properly.

3. Try a different VPN server/location: Some servers might have trouble with video streaming or the app’s communication channels, causing the black screen.

4. Update or reinstall the app: Make sure Rave app is updated to the latest version from the Play Store. If it is, uninstall and reinstall the app.

5. Network settings: Since Rave chat doesn’t work without VPN, it suggests some network restrictions possibly by your Internet Service Provider or regional blocks. Double-check if you have any firewall or data-saving settings on your Android device that might interfere.

6. Disable hardware acceleration in the app if possible: Some apps allow turning off hardware acceleration which can fix rendering black screen issues.

If after these steps the problem persists, we can explore more advanced options such as examining the app logs or testing with different network environments.

Also, I found that others report similar issues and solutions for Rave black screen with VPN available here in a step-by-step video guide which might be helpful: How To Fix Rave App Black Screen | Solution 1.

Could you let me know which steps you’ve tried so far and the answers to my questions about your VPN? That way I can guide you better.