At the moment this keyserver is down. So new installation has a problem to verify the pakfire signature because they can’t import the needed keys.
We have created a new dns entry (pgp.ipfire.org) so we can change the server in future without user actions.
At the moment we can’t change it so run:
sed -i “s|pgp.mit.edu|pgp.ipfire.org|g” /opt/pakfire/lib/functions.sh
on the commandline. After this pakfire should work again.