Spent countless attempt with other catalina images installation to no avail, I think this issue should be considered paying attention to, as I have read others having same crashing experience during the install. very frustrating.
tried the patch with olarila catalina.
on the other note, I attempted doing it manually as per the POST script, crashing begins after doing the first copy command to /System/Library/Extensions/ you may be able to do the next copy but in the background the crashing is silently doing its job already, until you cannot do any more at the terminal, the PAM error is already there for you.