It sounds like you're experiencing a frustrating issue with the Zoosk app showing a blank white screen with a moving blue line. Let's go through some steps to resolve this problem together.

1. Restart Your App: Close the Zoosk app completely and then reopen it. This might reset the app and solve the issue.

2. Clear Cache: Sometimes, clearing the app cache can help. Here’s how you can do it:
- Open the Settings on your device.
- Go to "Apps" or "App Manager".
- Find and select "Zoosk".
- Tap on "Storage" and then "Clear Cache".

3. Update Your App: Ensure that your Zoosk app is up to date. Go to the Microsoft Store and check for updates.

4. Reinstall the App: If the above steps didn’t work, try uninstalling the Zoosk app and then reinstalling it:
- Go to "Settings", then "Apps".
- Select "Zoosk" and click "Uninstall".
- After uninstalling, go to the Microsoft Store, search for Zoosk, and install it again.

5. Check Your Network Connection: Make sure your device has a stable internet connection. Try switching between Wi-Fi and mobile data to see if that resolves the issue.

6. Contact Zoosk Support: If the issue persists, you may need to contact Zoosk support for further assistance. You can reach them through Zoosk Support.

Please let me know if any of these steps help resolve the issue!