Hi there! Thanks for reaching out about the car rental submit button not working in the ID90 Travel app on your Windows device. Just to clarify, are you using the app through a web browser, or is this a desktop app? Also, have you noticed if this happens with all car rental entries or just specific ones? Any error messages showing up, or does the button simply not respond at all when you click it?

Meanwhile, I can guide you through some initial steps that often help with issues like this:

1. Refresh and Restart: Try refreshing the page or restarting the app/browser entirely. Sometimes, temporary glitches clear up this way.

2. Clear Cache and Cookies: Since you’re on Windows using WebKit, clearing your browser’s cache and cookies can remove stored data that might interfere with app functionality.

3. Check for Updates: Make sure your app or browser is up to date, as outdated versions may cause some features to malfunction.

4. Try a Different Browser: If you’re using a browser, attempt booking the car rental using a different one (like Chrome or Firefox) to see if the problem persists.

5. Disable Browser Extensions: Sometimes extensions interfere with web apps. Disable them temporarily to test the submit button again.

If these steps don't solve the issue, the problem might be deeper in how the app communicates with the car rental provider, CarTrawler. In such cases, I can help gather details for support or provide direct contact information for CarTrawler to troubleshoot the booking from their end1.

Could you let me know what you’ve already tried or any extra details you observe? That way, I can assist you better!