Much of the ISO you install is stored as a squashfs or squashed/compressed file-system... ie. the squashfs errors are inability to read your installation media thus it cannot read the data in order to install it to your destination.
Causes are
your ISO download was invalid.. anything done after that is lost,
invalid write of ISO to media (most common in my experience writing >100 ISOs per year to thumb-drive) or
you have a faulty thumb-drive (they're cheap media made to cost; I throw out 5+ per year).
Most likely option is 2 (invalid write) in my experience.
Some brand/models have firmware that has issues that are unique... (Sorry I don't know your hardware) but squashfs errors scream media errors as already explained.
FYI: I use hardware as old as 2005 for Quality Assurance (QA) testing of Ubuntu and flavors of Ubuntu.
As for checking if the write of ISO is valid etc.. refer to the link I posted before, ie. an answer I wrote on Is verifying ISOs downloaded from the official website worthwhile? or the original answer I wrote on Do I need to check the integrity of a Ubuntu install?. If I have issues with media I cannot explain, I boot the thumb-drive on two other boxes (one almost identical, one very different) and check the media on those boxes.