The download URL is wrong for the x64 release.
Currently it is set to https://github.com/notepad-plus-plus/notepad-plus-plus/releases/download/v8.5.8/npp.8.5.7.Installer.x64.exe
It should be https://github.com/notepad-plus-plus/notepad-plus-plus/releases/download/v8.5.8/npp.8.5.8.Installer.x64.exe
Thanks in advance for fixing the issue.
Currently it is set to https://github.com/notepad-plus-plus/notepad-plus-plus/releases/download/v8.5.8/npp.8.5.7.Installer.x64.exe
It should be https://github.com/notepad-plus-plus/notepad-plus-plus/releases/download/v8.5.8/npp.8.5.8.Installer.x64.exe
Thanks in advance for fixing the issue.