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Can't get answer for Error code: SEC_ERROR_UNKNOWN_ISSUER in your FAQ

I can not log in to one site. This began just a few days ago. I CAN log in using Chrome and Edge with no problem. I have refreshed Firefox, removed all add-ons, even u… (tuilleadh eolais)

I can not log in to one site. This began just a few days ago. I CAN log in using Chrome and Edge with no problem. I have refreshed Firefox, removed all add-ons, even uninstalled and reinstalled to no avail. This is the error message I receive today:

login.diamondresorts.com uses an invalid security certificate. The certificate is not trusted because the issuer certificate is unknown. The server might not be sending the appropriate intermediate certificates. An additional root certificate may need to be imported. Error code: SEC_ERROR_UNKNOWN_ISSUER

Yesterday I saw a longer text message with lots of coding 'jiberish'.

What can I do?

Asked by Joe Goldblatt 1 bhliain ó shin

Answered by cor-el 1 bhliain ó shin

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I found a fix for "Your connection is not secure"

Periodically when Firefox is updated, it starts rejecting Yahoo Mail from loading, giving the "Your connection is not secure" / SEC_ERROR_UNKNOWN_ISSUER error. Unfortuna… (tuilleadh eolais)

Periodically when Firefox is updated, it starts rejecting Yahoo Mail from loading, giving the "Your connection is not secure" / SEC_ERROR_UNKNOWN_ISSUER error. Unfortunately, it does not give you the option to add an exception, which clears up the problem most of the time.

Today this happened again with no ability to add an exception, and after looking at various websites for hours, trying to find a fix, I stumbled on one: Having Firefox "...automatically search for and import CAs that have been added to the Windows certificate store by a user or administrator." These are root certificates which you've manually imported. If you understood that last sentence, then it means you've probably done it on your computer; I know I have. The steps to fix it are these, and I cite the original web page further below:

- Open a new window in Firefox and type "about:config" without the quotes and hit enter - Confirm that you want to continue - In the search field, type in security.enterprise_roots.enabled and hit enter - you'll be left with one field - If it's marked as "false" then double-clicking it should turn it to "true" - Close the window, then go back to your Yahoo email login and try again. For me, this worked *perfectly*!

Here's the site where I found the info, under the "Experimental Built-in Windows Support" section: https://wiki.mozilla.org/CA:AddRootToFirefox

Good luck - I hope this helps to fix your Yahoo email login problem, too!

Asked by decay 1 bhliain ó shin

Answered by decay 1 bhliain ó shin