I downloaded the snapshot on a fresh install of RHEL Clone (Alamalinux) 8.5. It installed without issue.
the only things done where
download the binary installer
set executable to binary file
run installer as root
Installed java, installed lucee in /opt/lucee, started the lucee service
I had to manually fire up the browser to go view the lucee install, as the lucee install was done with root and the gui user was with a normal “non” privileged user account.
When you choose “use existing JRE” the script does find the correct environment but there is a hard coded /sys/ directory pointing to bash scripts that isnt created with the installer.
Line 95,96, 132 among others looking for a sys folder in lucee install root.
In the github repository you have linux/sys , maybe sys path needs to be included with the install machine?