Hi! I see you're encountering an "unexpected error" when entering your phone number in the Pengu app. That definitely sounds like something we should get sorted out. To help you best, could you tell me a bit more? For example:

- Is this error happening as soon as you type your phone number, or after you submit it?
- Are you using any particular format for your phone number (like including country code or not)?
- Have you tried restarting the app or your device yet?
- Are you connected to Wi-Fi or using mobile data during this?

To start, here are some things you can try:
1. Check the phone number format: Make sure you’re entering the complete phone number with your country code (e.g., +1 for the US) if the app requires it. Sometimes omitting the country code or adding extra spaces can cause validation errors.
2. Restart the app: Close the Pengu app fully, then reopen it and try again.
3. Restart your device: Since you’re on Windows 10 with WebKit browser, a quick reboot can clear temporary glitches.
4. Update the app/browser: If you’re accessing Pengu through a browser, make sure your browser is updated to the latest version. If it's a desktop app, check for any updates available.
5. Try a different network: Switch from Wi-Fi to a wired connection or vice versa to rule out connectivity issues.

If none of these work, sometimes errors like this can be due to server problems on Pengu’s side. Checking their status or waiting a bit to try again can help too.

Let me know what you’ve tried already or if you want me to suggest some more advanced steps!