The certificate of
https://mirrors.rpmfusion.org/ expired on June 4, 2017 at 5:41 PM. The current time is June 4, 2017 at 6:26 PM.
dnf upgrade failed:
Code:
Error: Error downloading packages:
Curl error (60): Peer certificate cannot be authenticated with given CA certificates for https://mirrors.rpmfusion.org/metalink?repo=free-fedora-updates-testing-26&arch=x86_64 [Peer's Certificate has expired.]