Hi there! I see you're having trouble signing in to YPT and receiving a "failed to connect to the server" message. Don't worry; let's work through this together.

To start, could you let me know if you’re currently connected to the internet and if you've tried using both Wi-Fi and mobile data? Sometimes, connectivity issues can stem from network problems.

In the meantime, here are a few steps you can try:

1. Check Your Internet Connection: Make sure you have a stable internet connection. Try visiting another website to ensure that your device is online.

2. Restart the App: Close the YPT app completely and then restart it. This can solve minor glitches.

3. Clear App Cache:
- Go to Settings on your Android device.
- Tap on Apps or Applications.
- Locate YPT from the list and select it.
- Tap on Storage and then Clear Cache.

4. Re-install the App: If the above steps don’t work, you can try uninstalling YPT and then reinstalling it from the Google Play Store.

5. Check Server Status: Sometimes, the issue might be with YPT's servers rather than your device. You can check if anyone else is experiencing the same problem on platforms like Reddit here or here.

If you've already tried any of these steps, please let me know so we can go deeper into troubleshooting. I'm here to help!