Hi there! I understand you're encountering a "Request Error" when trying to log into the Rochat app with your Gmail on a Windows device using a browser with WebKit. Let's get that sorted out together.

To better assist, could you tell me:

- Are you using a specific browser (for example, Safari for Windows or a Chromium-based one with WebKit)?
- Have you tried logging in with Gmail on any other device or browser successfully besides this one?
- Is this a fresh issue, or has it been happening for a while?

Meanwhile, here’s a step-by-step approach to troubleshoot this login error:

1. Clear Browser Cache and Cookies
Sometimes, outdated cache or cookies can interfere with login requests. On your browser, find the settings for clearing browsing data and clear cache and cookies, then try logging in again.

2. Ensure Browser is Updated
Make sure your browser is running the latest version. Sometimes older versions have compatibility issues with OAuth processes like Google login.

3. Disable Browser Extensions
Occasionally, extensions can block or interfere with login requests. Try disabling any ad blockers, privacy extensions, or similar add-ons temporarily, then attempt login again.

4. Check Network Restrictions
If you're on a work or school network, some security settings or firewalls might block the login request to Google through Rochat. Try connecting from a different network or using a VPN to see if that helps.

5. Try a Different Browser
If possible, try logging in using a different browser like Chrome or Firefox on your Windows machine to see if the issue is browser-specific.

6. Check Date and Time Settings
Ensure your computer’s date and time are set correctly, as an incorrect system time can cause authentication errors.

7. Review Any Error Messages in Detail
If the "Request Error" shows any error codes or additional details, please share them. That can help pinpoint the exact cause.

If you’ve tried these steps already or if the error persists, it may be related to a backend or server-side issue. Some users have reported similar problems with Rochat login on PC browsers, which were either resolved after server updates or required contacting support for account verification1.

Let me know what you find after trying these, or if you have more details, so we can dive deeper! Are you satisfied with the solution I provided so far?