Hello! I understand that you're experiencing an issue with the Quran 13 Line app where the screen is blank. Let's work together to resolve this.

First, can you tell me if the screen is blank only when you open the app, or is it happening throughout your device? Also, have you tried restarting your device or the app itself? Those initial steps can sometimes clear up any temporary glitches.

If you've already done those, we can dive a bit deeper. Here are a few things to try:

1. Force Close the App: Go to your device's settings, find the "Apps" section, locate the Quran 13 Line app, and select “Force Stop.” After that, try reopening the app.

2. Clear Cache: Sometimes, clearing the app's cache can help. In the same Apps section, tap on the Quran 13 Line app and look for "Storage." There, you should see an option to clear the cache.

3. Update the App: Check if there is an available update for the Quran 13 Line app in the Google Play Store. Updating can fix bugs or glitches.

4. Reinstall the App: If the above steps don’t work, you might want to uninstall the app and then reinstall it from the Google Play Store. This can often help if there's a corrupted file.

5. System Restart: Lastly, try restarting your device. Sometimes, this can resolve issues caused by other apps running in the background.

Let me know if you've tried any of these steps or if you need more detailed instructions on any of them!