Yup, same problem here. Tried the last two version and same thing. Tried on 3 different machines too.
Too bad. That is a show stopper.
Discovered that if you install version 2.3 or 2.4, it will install fine. Then you can upgrade to the latest version.
Hopefully someone will fix the gpg key problem on a clean installation.
That means it is better to use the old version and then update it ?