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Fixing "Error: 404" Response [11/1/20]
Fixing "Error: 404" Response [11/1/20]

Diagnose the cause of an "Error: 404" response within Vocareum Labs and fix errors caused by "invalid certificate authority".

Jeffrey Eng avatar
Written by Jeffrey Eng
Updated over 4 years ago

If you've encountered the error below within our platform, please use this article for assistance in resolving the issue.

Error: 404

Please try reloading after a short interval; if this problem persists,
please contact Vocareum Technical Support.

Troubleshooting

Step 1: Load the Page on Another Web Browser

(Skip this step if you don't have a second web browser.)

First, navigate to the page where you're experiencing the error. Try loading the page in a second web browser—preferably one that you have not used for Vocareum Labs in the past.

If the page loads without any problems in the second browser, you likely need to clear the cache of your initial browser.

If this doesn't work, move on to the next step for information on how to further identify the error.

Step 2: Use Your Browser's Developer Tools and Check the Console

Open the developer toolkit on your respective browser and go to the console tab. If you're unsure of how to do this, click here for more information.

After opening the console, you should see something similar to this:

(If the console is empty, reload the page and it should populate with information.)

The console will show any JavaScript errors encountered by the browser client when loading the page. This information can potentially identify the error's root cause. Take a screenshot of webpage along with the console's output. We may ask you to send us the screenshot if you continue having issues.

Step 3: Look for an Invalid Certificate Error

On the affected page, look through the entries in red for the following:

> POST..

//There will be a long URL string here

...net::ERR_CERT_AUTHORITY_INVALID

If you see net::ERR_CERT_AUTHORITY_INVALID, please clear your browser cache. After you've cleared your cache, restart your browser and try loading the page again.

Why You Have to Clear Your Cache:

Your browser has a deprecated certificate cached which expects a different response from the server during the SSL/TLS handshake. The incorrect response makes your browser think the connection "is not secure" when attempting to access the desired resource. This manifests as a 404 error in our labs.

If you do not see net::ERR_CERT_AUTHORITY_INVALID in the console or clearing your cache did not resolve the issue, please send us a message and include a screenshot of both the error and your console.

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