While I have checked numerous guides around (but non worked), tried the installer which didn't work, tried the manual way which didn't work.
Checking the diagnostics log I can't see what would be wrong. To make it clear, the game will launch normally but it seems something is failing and it wont load LCPDFR, I am missing something? Also I have no other mods installed at the time.
[Asi loader] Using dsound
[ScriptHookDotNet] Found
[ScriptHookDotNet] Valid
[System dependencies] Verifying dependencies integrity
[System dependencies] Checking MSVCR110.DLL
[System dependencies] Checking dependencies (32-bit required: True)
[System dependencies] Resolved KERNEL32.dll to C:\WINDOWS\SysWOW64\KERNEL32.dll
[System dependencies] Check passed
[System dependencies] Checking MSVCP110.DLL
[System dependencies] Checking dependencies (32-bit required: True)
[System dependencies] Resolved MSVCR110.dll to C:\WINDOWS\SysWOW64\MSVCR110.dll
[System dependencies] Resolved KERNEL32.dll to C:\WINDOWS\SysWOW64\KERNEL32.dll
[System dependencies] Check passed
[System dependencies] Checking MSCOREE.DLL
[System dependencies] Checking dependencies (32-bit required: True)
[System dependencies] Resolved KERNEL32.dll to C:\WINDOWS\SysWOW64\KERNEL32.dll
[System dependencies] Check passed
[System dependencies] Checking SCRIPTHOOK.DLL
[System dependencies] Checking dependencies (32-bit required: True)
[System dependencies] Resolved KERNEL32.dll to C:\WINDOWS\SysWOW64\KERNEL32.dll
[System dependencies] Resolved USER32.dll to C:\WINDOWS\SysWOW64\USER32.dll
[System dependencies] Check passed
[System dependencies] Checking MSVCR100.DLL
[System dependencies] Checking dependencies (32-bit required: True)
[System dependencies] Resolved KERNEL32.dll to C:\WINDOWS\SysWOW64\KERNEL32.dll
[System dependencies] Check passed
[System dependencies] Checking D3DX9_43.DLL
[System dependencies] Checking dependencies (32-bit required: True)
[System dependencies] Resolved msvcrt.dll to C:\WINDOWS\SysWOW64\msvcrt.dll
[System dependencies] Resolved GDI32.dll to C:\WINDOWS\SysWOW64\GDI32.dll
[System dependencies] Resolved KERNEL32.dll to C:\WINDOWS\SysWOW64\KERNEL32.dll
[System dependencies] Resolved ADVAPI32.dll to C:\WINDOWS\SysWOW64\ADVAPI32.dll
[System dependencies] Check passed
[System dependencies] Checking ScriptHookDotNet.asi
[System dependencies] Checking dependencies (32-bit required: True)
[System dependencies] Resolved KERNEL32.dll to C:\WINDOWS\SysWOW64\KERNEL32.dll
[System dependencies] Resolved ScriptHook.dll to C:\Program Files (x86)\Steam\steamapps\common\Grand Theft Auto IV\GTAIV\ScriptHook.dll
[System dependencies] Resolved MSVCR100.dll to C:\WINDOWS\SysWOW64\MSVCR100.dll
[System dependencies] Resolved USER32.dll to C:\WINDOWS\SysWOW64\USER32.dll
[System dependencies] Resolved d3dx9_43.dll to C:\WINDOWS\SysWOW64\d3dx9_43.dll
[System dependencies] Resolved mscoree.dll to C:\WINDOWS\SysWOW64\mscoree.dll
[System dependencies] Check passed
[System dependencies] v2.0.50727 2.0.50727.4927 SP2
v3.0 3.0.30729.4926 SP2
v3.5 3.5.30729.4926 SP1
v4
Client 4.7.02556
Full 4.7.02556
v4.0
Client 4.0.0.0
[System dependencies] The .NET Framework is installed in an unknown version (> 4.5.1)
[System dependencies] Checking ADVANCEDHOOK.DLL
[System dependencies] Checking dependencies (32-bit required: True)
[System dependencies] Resolved ScriptHook.dll to C:\Program Files (x86)\Steam\steamapps\common\Grand Theft Auto IV\GTAIV\ScriptHook.dll
[System dependencies] Resolved VERSION.dll to C:\WINDOWS\SysWOW64\VERSION.dll
[System dependencies] Resolved PSAPI.DLL to C:\WINDOWS\SysWOW64\PSAPI.DLL
[System dependencies] Resolved dbghelp.dll to C:\WINDOWS\SysWOW64\dbghelp.dll
[System dependencies] Resolved KERNEL32.dll to C:\WINDOWS\SysWOW64\KERNEL32.dll
[System dependencies] Resolved USER32.dll to C:\WINDOWS\SysWOW64\USER32.dll
[System dependencies] Resolved SHELL32.dll to C:\WINDOWS\SysWOW64\SHELL32.dll
[System dependencies] Resolved MSVCR110.dll to C:\WINDOWS\SysWOW64\MSVCR110.dll
[System dependencies] Resolved MSVCP110.dll to C:\WINDOWS\SysWOW64\MSVCP110.dll
[System dependencies] Resolved mscoree.dll to C:\WINDOWS\SysWOW64\mscoree.dll
[System dependencies] Check passed
[System dependencies] Checking ADVANCEDHOOKINIT.ASI
[System dependencies] Checking dependencies (32-bit required: True)
[System dependencies] Resolved VERSION.dll to C:\WINDOWS\SysWOW64\VERSION.dll
[System dependencies] Resolved KERNEL32.dll to C:\WINDOWS\SysWOW64\KERNEL32.dll
[System dependencies] Resolved USER32.dll to C:\WINDOWS\SysWOW64\USER32.dll
[System dependencies] Resolved MSVCR110.dll to C:\WINDOWS\SysWOW64\MSVCR110.dll
[System dependencies] Resolved MSVCP110.dll to C:\WINDOWS\SysWOW64\MSVCP110.dll
[System dependencies] Check passed
[System dependencies] Checking SLIMDX.DLL
[System dependencies] Checking dependencies (32-bit required: True)
[System dependencies] Resolved MSVCR100.dll to C:\WINDOWS\SysWOW64\MSVCR100.dll
[System dependencies] Resolved KERNEL32.dll to C:\WINDOWS\SysWOW64\KERNEL32.dll
[System dependencies] Resolved ole32.dll to C:\WINDOWS\SysWOW64\ole32.dll
[System dependencies] Resolved USER32.dll to C:\WINDOWS\SysWOW64\USER32.dll
[System dependencies] Resolved GDI32.dll to C:\WINDOWS\SysWOW64\GDI32.dll
[System dependencies] Resolved WINMM.dll to C:\WINDOWS\SysWOW64\WINMM.dll
[System dependencies] Resolved ADVAPI32.dll to C:\WINDOWS\SysWOW64\ADVAPI32.dll
[System dependencies] Resolved MSVCP100.dll to C:\WINDOWS\SysWOW64\MSVCP100.dll
[System dependencies] Resolved mscoree.dll to C:\WINDOWS\SysWOW64\mscoree.dll
[System dependencies] Check passed
[System dependencies] No problems found
[LCPD First Response] Checking LCPDFR installation
[LCPD First Response] No problems found
[Log Check] Checking log files
[Log Check] asilog.txt seems okay
[Log Check] ScriptHookDotNet.log doesn't find loader script
[Log Check] ScriptHookDotNet.log doesn't start loader script
[Log Check] 2017-12-26 16:20:19 - Initializing ScriptHookDotNet v1.7.1.7 BETA (on GTA IV version 1.0.7.0 with C++ Hook version 0.5.1)