I’m creating an installer to download a file and exec it with NSIS. It shows connecting… for a while and finally a “download failed …” message box, here are my scripts:

!include "LogicLib.nsh"

; Name of the installer executable
OutFile "MyInstaller.exe"

; Define the temporary file path

; Define the URL of the offline installer
Section 

; Set the URL to download the file from 
StrCpy $0 https://7-zip.org/a/7z2408-x64.exe

; Set the path where the file will be saved 
StrCpy $1 $Temp7z.exe
; Use the NSISdl plugin to download the file 
NSISdl::download $0 $1 Pop $0 
; Get the return value 
; Check if the download was successful 
StrCmp $0 "success" 0 +3 
ExecWait '"$1"' 
Goto end 
; If download failed, display an error message 
MessageBox MB_OK "Download failed: $0" 
end: 
; End the section 
SectionEnd