Seems there was a problem with last iso image. Did see new version of sudo but seems there is a syntax change in sudoers file. Which meant that ablive did not have root access. A quick edit of customize file sorted the problem and sudo works fine now, as well as installer.
Have had a couple of users contact me regarding issue which I am very grateful for ;-)…
Sorry maybe I should just test image before I upload so guess I slipped up this occasion, anyway hopefully all fixed now.
Stay safe ….