I had this same problem and was able to work around the bug by clicking "Skip" when the installer was configuring APT (the installer then finished successfully) and then type the following commands on the finished system from a terminal window:
sudo rm -f /var/lib/apt/lists/lock sudo dpkg --configure -a sudo apt-get update
Now, it works correctly.
I had this same problem and was able to work around the bug by clicking "Skip" when the installer was configuring APT (the installer then finished successfully) and then type the following commands on the finished system from a terminal window:
sudo rm -f /var/lib/ apt/lists/ lock
sudo dpkg --configure -a
sudo apt-get update
Now, it works correctly.