Error UCSO - LNK2019 Error

[Max-Q]

So I am trying to add UCSO to a project, and no matter wat I do I can't make it compile. This is the error I get:
UCSO_API.lib(VesselAPI.obj) : error LNK2019: unresolved external symbol [email protected] referenced in function "class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > __cdecl std::filesystem::_Convert_wide_to_narrow_replace_chars<struct std::char_traits<char>,class std::allocator<char> >(enum __std_code_page,class std::basic_string_view<wchar_t,struct std::char_traits<wchar_t> >,class std::allocator<char> const &)" (??[imath][email protected]?[/imath][email protected]@[email protected]@V?[imath][email protected]@[email protected]@[email protected]@@YA?AV?[/imath][email protected]?[imath][email protected]@[email protected]@V?[/imath][email protected]@[email protected]@[email protected][email protected]@V?[imath][email protected]_WU?[/imath][email protected][email protected]@@@[email protected][email protected]@[email protected]@Z)

Google doesn't seem to be any help, so I am kind of stuck here.
After some testing, I narrowed it down to (I think) this piece of code; if I get rid of the line ucso = UCSO::Vessel::CreateInstance(this);, the project compiles, but obviously CTDs Orbiter.

Cargo::Cargo(OBJHANDLE hVessel, int flightmodel)
    : VESSEL4(hVessel, flightmodel)
{
    ucso = UCSO::Vessel::CreateInstance(this);
    sprintf(buffer, "UCSO version: %s", ucso->GetUCSOVersion());
    message = _strdup(buffer);
}

Any help would be appreciated.

 

[GLS]

Try to compile you project as C++17 (Project Properties > C/C++ > Language > C++ Language Standard).

 

[Max-Q]

Try to compile you project as C++17 (Project Properties > C/C++ > Language > C++ Language Standard).

Actually already set up as C++ 17. Any other ideas?

 

[GLS]

Try playing with Project Properties > General > Character Set

 

[Max-Q]

Still no luck.