I was not getting a request for a password, instead it just reported an error and locked up. This was Ubuntu 18.04 LTS.
Learned from forums that 16.04 was verified so tried to install using Ubuntu 16.04. Error at same point but different message - machine loses it after a few minutes trying to unlock.
Can anyone confirm that Ubuntu 18.04 is out and could someone point me in the right direction for a solution?