I am not able to install Brave Browser and cannot seem to fix it.
W: GPG error: https://brave-browser-apt-release.s3.brave.com cosmic InRelease: The following signatures were invalid: EXPKEYSIG 4FE13824E3FFC656 Brave Software <firstname.lastname@example.org> E: The repository 'https://brave-browser-apt-release.s3.brave.com cosmic InRelease' is not signed. N: Updating from such a repository can't be done securely, and is therefore disabled by default.
sudo apt-key list | grep expired
pub rsa4096 2018-10-15 [SC] [expired: 2019-04-13] uid [ expired] Brave Software <email@example.com>
sudo apt-key adv --keyserver keys.gnupg.net --recv-keys 4FE13824E3FFC656 and got:
Executing: /tmp/apt-key-gpghome.1CQeA81kHh/gpg.1.sh --keyserver keys.gnupg.net --recv-keys 4FE13824E3FFC656 gpg: keyserver receive failed: No data
Now I am stuck. Can anyone help?