Hello! I understand you're getting an "access denied" message when trying to use The Great Courses Plus, and that can definitely be a roadblock. To help you best, could you share if this is happening right at login or while accessing specific courses? Also, have you tried logging in on another device or browser yet?

Meanwhile, here’s a step-by-step approach we can take to troubleshoot this on your Windows device:

1. Reset Your Password:
Even if you’re sure your credentials are correct, please use the “Forgot Password” option on the login page to reset your password just in case a recent update requires one.

2. Check Browser and Clear Cache:
Since you’re using a WebKit browser on Windows 10, clearing the browser cache and cookies can often help. You can do this from your browser settings under privacy or history.

3. Disable VPN or Antivirus Temporarily:
If you’re using a VPN or antivirus software, these can sometimes block access. Try turning them off briefly and attempt to log in again.

4. Try a Different Browser:
Sometimes browser-specific issues cause login problems. If your current browser is WebKit-based, try a different browser like Chrome or Firefox to see if it works there.

5. Confirm Account Status:
If you had both The Great Courses and The Great Courses Plus accounts before, make sure they are linked correctly. Using the right account is important to avoid access issues.

If you have tried any of these already, please let me know which steps you took, and we can dig deeper. Otherwise, please give these a try and tell me how it goes!

Are you satisfied with this plan to resolve the issue so far?