Can you please provide some additional information such as the exact URL you are referring to?
What happens when you run the connectivity test from SupportAssist?
404 - File or directory not found.
The resource you are looking for might have been removed, had its name changed, or is temporarily unavailable.
That is the correct result we are expecting for the URL test.
Please verifying the server certificate
1. On the address bar, click the Security Report icon , and then click View Certificates. The Certificate is displayed.
2. In the General tab, verify if the certificate displays a valid date.
3. Click the Certification Path tab, and verify if the GTE CyberTrust Global root certificate is listed.
If all the above is good, I am going to request that you engage Dell Technical Support so they can further troubleshoot.
I have also the same issue. I have followed what you suggested and it doesn't have GTE CybertTrust Global root certificate listed.
Have you tried to remove the certificate and import it again? If not, please try that and let us know if the problem persists.
In the general tab, does it display a button to Install Certificate?
If so, click on that and it should over right the existing certificate if already installed. You want to make sure the store location is Local computer.