Maybe you've come this far looking for a fix to the sec_error_unknown_issuer bug which usually happens with the Mozilla Firefox web browser and can also happen with Google Chrome (and on a number of different operating systems). But don't worry, it's nothing serious, and it can be solved in a simple way as we explain in this tutorial.
About sec_error_unknown_issuer
sec_error_unknown_issuer is an error that usually presents the web browser there are problems with the SSL security certificates. It usually occurs when the user tries to access the websites of institutions that belong to the public administration or when the certificates are self-signed and this annoying error occurs that prevents you from continuing.
In this sense, the browser blocks it because it detects problems in the certificates and for the good of the user and their security, it sends this message sec_error_unknown_issuer on an error page. Also, it is common for the SERVER NOT FOUND error to occur, in which case you should know the cause, if it is really that the server cannot be accessed or if it is a problem with the certificates.
How to fix sec_error_unknown_issuer in Firefox
If you wish to fix type errors sec_error_unknown_issuer of your web browser, we recommend that you follow these simple guidelines:
- Uninstall antivirus software if you have it on your GNU/Linux distro. Although it is not common to have software of this type, it is possible that in some cases the error is caused by this program, especially some free ones that see it as a threat. It can happen with antivirus like Kaspersky, Avast, ESET, etc.
- Disable HTTPS scanning. If you do not consider the previous point as the cause of the problem or you do not want to uninstall the antivirus, it is probably this other point that is causing the error. You must access the antivirus and in its graphical interface look for the HTTPS Scanning and Scan web encryption options to deactivate them. Save changes and exit, now sec_error_unknown_issuer should no longer appear.