Hi there! Let me help you sort out the login issue with the Flashfood app. To get started, can you tell me a bit more about what's happening when you try to log in? For example, do you see an error message, or does the app just not respond? Also, have you tried logging in recently after any app updates or changes? This info will help me narrow down the best next steps.

Meanwhile, here are some common steps that usually help resolve login problems on Android devices like yours (WebKit browser on Android OS 10):

1. Update the App: Make sure you have the latest version of the Flashfood app installed from the Google Play Store. Updates often fix bugs that could cause login problems.

2. Toggle Airplane Mode: Switch Airplane mode on for a few seconds and then off again. This resets your network connections and can help if it's a connectivity issue.

3. Clear App Cache & Data: Go to your device’s Settings > Apps > Flashfood > Storage, and clear the cache first. If that doesn’t work, clear data too (note this might log you out and reset app settings).

4. Check Internet Connection: Ensure your internet is stable, whether Wi-Fi or mobile data, since a weak connection can interrupt login.

5. Restart Your Device: Sometimes a simple reboot can fix app glitches.

6. Password and Account Check: If it says your password is incorrect but you’re sure it’s right, try resetting your password via the app or website.

If these don’t solve the issue, please let me know what you’ve tried and any specific error messages you’re receiving. I can then guide you further, even checking if there’s an issue on their end.

Are you able to try these steps and update me on what happens?