- Linux Mint 17.3 (based on Ubuntu 14.04)
- Emacs 25.3.1
The value of
(("gnu" . "https://elpa.gnu.org/packages/") ("melpa" . "https://melpa.org/packages/") ("marmalade" . "https://marmalade-repo.org/packages/"))
When I ran
M-x list-packages, the minibuffer shows:
"Continue connecting? (No, Session only, Always)".
*Nework Security Manager* buffer shows up with some information, and the error:
The TLS connection to elpa.gnu.org:443 is insecure for the following reason: certificate could not be verified
Please see the attached picture for the detail.
I could choose
Session only to proceed though.
What debugging technique is available to help narrow down the issue?