The bot suspected that it was simply a problem with the instalation media, and suggested md5sum check. But I did check md5sum all good, so it is not this problem. Eventually, I had to work on wiping out the linux installation partition, extend the main primary windows partition till full disk, then run the same usb install again and then it worked all good.
** Changed in: ubiquity (Ubuntu) Status: Incomplete => New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1595615 Title: lubuntu installer automatically has chosen to install onto a partition with insufficient space To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1595615/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs