When installing PureOS to a Librem 13 (TPM) the following error occurs during Disk Partitioning:
“Loading libc6-udeb failed for unknown reasons. Aborting”
This might not be a direct solution to your problem, but I can say though that I had issues installing PureOS from live install too.
As far as I know there are two ways of installing the OS:
you click the live CD option (from the boot menu) -> you check out the OS -> you click a dedicated button from the OS interface saying smth like “install PureOS”
you click the install PureOS option (from the boot menu) -> you go through the installation process
So in my case, the first option gave me errors and I had to reinstall it by using the method nr. 2 and it worked like a charm. Hope this helps.
p.s. please don’t try and search for the exact button/word names I wrote, they have an indicative purpose only, I don’t know what are their proper names. Like, live CD might actually have a different name, like live install or smth.
The live installer didn’t work for me either due to a python library problem. You can fix it temporarily (without waiting for a new release) by booting the live image, then opening a terminal and typing: