Unable to update modules and unable to make any changes in System Admin due to key expiring

2

Keep trying any of these until you get a server that works:

sudo -u asterisk gpg --refresh-keys --keyserver pool.sks-keyservers.net
sudo -u asterisk gpg --refresh-keys --keyserver hkp://keyserver.ubuntu.com:80
sudo -u asterisk gpg --refresh-keys --keyserver pgp.mit.edu
sudo -u asterisk gpg --refresh-keys --keyserverkeyserver.pgp.com