Script fails to find package installer

[grahampugh]

Describe the bug
Script fails to find package installer when --move not used.

To Reproduce

sudo /Library/Management/erase-install/erase-install.sh --os=12 --build=21A559 --test-run --no-fs --check-power --power-wait-limit 180 --reinstall --min-drive-space 10 --current-user --pkg

Expected behavior
Package is discovered and the script continues.

Code/log output

   [erase-install] v24.0 script execution started: Di 26 Okt 2021 19:49:59 CEST
   [erase-install] Caffeinating this script (pid=46199)

*** TEST-RUN ONLY! ***
* This script will perform all tasks up to the point of erase or reinstall,
* but will not actually erase or reinstall.
* Remove the --test-run argument to perform the erase or reinstall.
**********************

   [free_space_check] OK - 17907544 KB free disk space detected
   [check_power_status] OK - AC power detected
   [erase-install] Looking for existing installer app or pkg
   [find_existing_installer] No valid installer found.
yes username is a member of staff
   [get_user_details] username is a Volume Owner
   [check_password] Success: the password entered is the correct login password for username.
   [erase-install] Starting download process
   [erase-install] Opening jamfHelper download message (language=de)
   [get_installinstallmacos] installinstallmacos.py is in /Library/Management/erase-install
   [get_relocatable_python] Relocatable Python is installed in /Library/Management/erase-install
   [run_installinstallmacos] Checking that selected OS 12 is available

   [run_installinstallmacos] This command is now being run:

   installinstallmacos.py --workdir /Library/Management/erase-install --ignore-cache --pkg --os 12 --validate
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 11.2G  100 11.2G    0     0  24.1M      0  0:07:58  0:07:58 --:--:-- 21.1M

installinstallmacos.py - get macOS installers from the Apple software catalog

This Mac:
Model Identifier : MacBookPro17,1

Device ID        : J293AP
OS Version       : 11.6
Build ID         : 20G165

 #  ProductID       Version    Build    Post Date   Title                          
 1  071-72781       11.5.1     20G80    2021-07-26  macOS Big Sur                  
 2  071-78704       11.5.2     20G95    2021-08-18  macOS Big Sur                  
 3  071-97382       11.6       20G165   2021-09-17  macOS Big Sur                  
 4  002-23589       11.6.1     20G224   2021-10-25  macOS Big Sur                  
 5  002-23774       12.0.1     21A559   2021-10-25  macOS Monterey                 

Build 21A559 selected. Downloading #5...

Package downloaded to: /Library/Management/erase-install/InstallAssistant-12.0.1-21A559.pkg
   [run_installinstallmacos] InstallAssistant package downloaded.
   [erase-install] Closing jamfHelper download message (language=de)
   [erase-install] 'jamfHelper' ended

   [erase-install] ERROR: Can't find the installer! 
/Library/Management/erase-install/erase-install.sh: line 920: 46262 Terminated: 15          "$jamfHelper" -windowType hud -windowPosition ul -title "${!dialog_dl_title}" -alignHeading center -alignDescription left -description "${!dialog_dl_desc}" -lockHUD -icon "$dialog_dl_icon" -iconSize 100
   [erase-install] 'caffeinate' ended

Environment (please complete the following information):

• erase-install version [e.g. 24.0] - 24.0