If you have anything to complain and want it to be removed (since having it being corrupted that would be a good reason), you have to report the OP.
The ldx repacks are quite common, it's also known that these are installers for the game because they get extracted. Maybe that one got corrupted. It can also be it got corrupted while downloading (or rather while it's being saved to your pc) or from your antivirus.
The instructions also say:
As I wrote that answer, I am downloading the compressed version, too, just to test, if it's really corrupted or if the problem is on your end

Will edit my answer soon, just to confirm if it's working here or if I get the same error.
edit: here is my edit, as promised.
As you can see in my screenshot: It installed flawlessly. You might really want to try to disable antivirus on your system for the installation. After that, you can just re-enable it and play the game normally.