Hi there! I understand you're experiencing issues with VANSi app related to bank connectivity errors and troubles requesting a new advance after paying off a previous one. Let's get to the bottom of this together.

To better help you, can you please tell me:

1. When did you pay off your previous advance?
2. Are you seeing any specific error messages in the app when trying to connect your bank or request a new advance?
3. Has your bank account been linked successfully before, or is this your first time connecting it in the app?
4. Are you using the latest version of the VANSi app on your device?

In the meantime, here are some common steps that typically help resolve these kinds of issues:

1. Verify the payoff is fully processed: Sometimes bank transactions take a few days to reflect on both your bank and VANSi’s side. The app may not update instantly even if your bank shows the payment. Double-check your bank statement and the VANSi app transaction status.

2. Refresh Bank Connection: Go to the app’s bank settings and try to re-authenticate or refresh the connection with your bank. Any interruption or expired token can lead to errors.

3. Clear App Cache or Reinstall: On your WebKit browser with Windows 10, clear the browser cache or try using the app in a different browser or reinstall the VANSi app if available.

4. Check for App Updates: Ensure you have the latest VANSi app version installed, as bugs causing connectivity issues may have been fixed in an update.

5. Contact VANSi support: If none of these work, sometimes the issue is on VANSi's end with the update process after payoff. You'll want to reach out directly to their support for assistance or wait for their system to reflect the payoff status properly. You can contact them through their official Contact Us page 2.

Let me know the details I asked for, and if you’ve already tried any of these steps, so I can guide you further! Are you able to provide more information on what you’ve tried so far?