I launch Charles 4.1.2 on my Linux Mint and try to map remote HTTPS request. So, I generated an SSL key like in that article http://codeblog.shape.dk/blog/2014/01/06/custom-ssl-certificate-with-charles-web-proxy/ and added it to the SSL Proxy client and root certificates (Charles proxY: rewrite on https does not work). But it still doesn't work.
Error code: SEC_ERROR_UNKNOWN_ISSUER
I'm also added this certificate to the Mozilla certifications and enabled that site in always trusted
It repairs by re-adding the certificate