Error Messages

This section of articles consists of basic troubleshooting issues that you may try when experiencing issues with your account.

Access Denied Error in Practice Labs
If you're experiencing an "Access Denied" error while trying to access lab content on, this article will guide you through t...
Tue, Nov 7, 2023 at 4:44 PM
CertMetrics labs not working due to cookies
The issue you are having is that your browser is blocking third-party cookies, and the cookies are used to authenticate you into the lab environment. 3r...
Tue, Nov 7, 2023 at 4:45 PM
How to Fix an Error Code 400 Bad Request
An Error Code 400 (Bad Request) is perceived by the server as a generic client error and it is returned when the server determines the error doesn’t fall in...
Tue, Aug 18, 2020 at 8:35 PM
I cannot access my practice lab.
Make sure you are logged in to the site properly. Go to and click "Login" to log in to your account. If you forg...
Tue, May 2, 2023 at 9:10 AM
Quiz Not Showing Results: Troubleshooting Steps
When taking a quiz, you expect to receive your score upon completion. However, there may be instances when the score is not displayed. This article will gui...
Tue, Nov 7, 2023 at 4:49 PM