To resolve the "server unreachable" issue when trying to log in to the Litmatch app, follow these detailed steps:

1. Check Your Internet Connection:
- Ensure you have a stable internet connection. Try browsing other websites or using other apps to confirm connectivity.
- Restart your Wi-Fi router or switch to mobile data if available.

2. Restart the Litmatch App:
- Close the Litmatch app completely. You can do this by swiping it away in the app switcher.
- Reopen the app and attempt to log in again.

3. Clear App Cache:
- Go to your device’s settings.
- Navigate to Apps or Application Manager.
- Locate and select Litmatch.
- Tap on Storage then choose Clear Cache to remove temporary files that might be causing issues.

4. Update the Litmatch App:
- Check for any available updates for the Litmatch app in the Google Play Store.
- If an update is available, download and install it to ensure you have the latest version with potential bug fixes.

5. Reinstall the Litmatch App:
- If the above steps do not resolve the issue, uninstall the Litmatch app.
- Go to the Google Play Store, search for Litmatch, and reinstall it. This can fix any corrupted files affecting connectivity.

6. Check for System Updates:
- Ensure your Android operating system is up-to-date. Go to Settings, then System, and select Software Update to check for updates.

7. Disable VPN or Proxy:
- If you are using a VPN or proxy, disable it as this might interfere with the app’s ability to connect to the server.

8. Contact Support:
- If the problem persists after completing the above steps, consider reaching out to Litmatch support for further assistance. You can find help through their official channels or forums.

For additional guidance, you may find these video tutorials helpful:

- "How To Fix And Solve Server Error On Litmatch App" - learn more

- "Fix Litmatch Login Error" - learn more

Following these steps should assist you in logging back into the Litmatch app successfully.