The assistant doesn't work for me either. It can't detect my SSD for some reason that's why I linked the post explaining the manual way to do it.
But seeing as how you have a different error from me it might be worth looking at what dmesg might have.
After the failed chroot attempt and getting that warning message do this
sudo dmesg | nc termbin.com 9999
and upload the URL outputted we can see if dmesg has any useful logs for us.
BTW, the credentials for live environment if sudo asks is garuda. Also you need to be connected to internet for this to work.
You can also open a browser in your live ISO session and open forum there. Responding in forum and copying commands being asked to try or articles being asked to follow would be easier.