Well you asked for it: My feedbakck on the installation
Endless number of unhelpfull Critical errors when trying to setup partitions. This is quite a buggy part of the software
mount: /run/cockpit/btrfs/19685876-a72e-45a7-9fae-61db8932d6e5: fsconfig system call failed: No such file or directory. dmesg(1) may have more information after failed mount system call. Command '['mount', '/dev/sda3', '/run/cockpit/btrfs/19685876-a72e-45a7-9fae-61db8932d6e5']' returned non-zero exit status 32.
Mmmmmm
It seems we would need a lot more information to even begin to consider what may have happened.
What version were you attempting to install?
What software are you considering to be at fault?
What is your hardware?
How were you doing the installation?
What is the output of sudo dmesg as the error suggest when the error happens?
Also the output of lsblk -f for your disks and the output of inxi -Fzxx for the hardware.