Installer WebUI Critical Error:
org.fedoraproject.Anaconda.Error: 'NoneType' object has no attribute 'path'

Please attach the log file /tmp/journal.log to the issue.

---[ System & Environment Information ]---
OS: Fedora Linux 43 (KDE Plasma Desktop Edition)
Anaconda version: 43.44
Anaconda UI version: 53.14.g7ea927aa

Reproducible: I could reproduce it in the same session (without restart)

Steps to Reproduce:
1. Use the installer to try to install fedora kde
2. setting custom mounts: / (btrfs), /boot (ext4), with a shared /boot/efi (shared with arch linux)
3. 
Actual Results:
installer crashes on the last step

Expected Results:
it installs fedora

EDIT (not sure how relevant):
I seems to have installed fedora, kinda...I could boot into it (from my arch grub, after updating that)
But after rebooting fedora with updating, it gets stuck somewhere between kernel and userland. (eg. init=/bin/bash boots, but everything else does not)