Do you have a backup? If so, restore to that.
This is a case of multiple failed installs. Your very first install failed, and localconfig.xml was wiped. You reinstalled, and you have the:
Code:
Warning: null valued key 'mysql_logger_root_password'
Which indicates the value is null for the localconfig.
Now the installer is plain screwy.
We really should find out why it failed to begin with.