Something tells me it could be antivirus software. Every time we do an update there are several reports about issues with antivirus. I wish people would report the problem to the antivirus software developers, instead of us, as the bug is not in LFS but the antivirus software. 
Anyway, maybe that's not what's happening in your case.
Do you have antivirus software?
Do you see something like the attached image when you run the installer?
EDIT: If you have the correct LFS.exe in your folder, it will have date: 18 June 2024

Anyway, maybe that's not what's happening in your case.

Do you see something like the attached image when you run the installer?
EDIT: If you have the correct LFS.exe in your folder, it will have date: 18 June 2024